swscale/range_convert: drop redundant conditionals from arch-specific init functions

These conditions are already checked for in the main init function.

libswscale/aarch64/swscale.c

@@ -228,7 +228,6 @@ av_cold void ff_sws_init_range_convert_aarch64(SwsInternal *c)
     int cpu_flags = av_get_cpu_flags();
 
     if (have_neon(cpu_flags)) {
-    if (c->srcRange != c->dstRange && !isAnyRGB(c->dstFormat)) {
         if (c->dstBpc <= 14) {
             if (c->srcRange) {
                 c->lumConvertRange = ff_lumRangeFromJpeg_neon;
@@ -239,7 +238,6 @@ av_cold void ff_sws_init_range_convert_aarch64(SwsInternal *c)
             }
         }
     }
-    }
 }
 
 av_cold void ff_sws_init_swscale_aarch64(SwsInternal *c)

libswscale/loongarch/swscale_init_loongarch.c

@@ -29,7 +29,6 @@ av_cold void ff_sws_init_range_convert_loongarch(SwsInternal *c)
     int cpu_flags = av_get_cpu_flags();
 
     if (have_lsx(cpu_flags)) {
-        if (c->srcRange != c->dstRange && !isAnyRGB(c->dstFormat)) {
             if (c->dstBpc <= 14) {
                 if (c->srcRange) {
                     c->lumConvertRange = lumRangeFromJpeg_lsx;
@@ -39,11 +38,9 @@ av_cold void ff_sws_init_range_convert_loongarch(SwsInternal *c)
                     c->chrConvertRange = chrRangeToJpeg_lsx;
                 }
             }
-        }
     }
 #if HAVE_LASX
     if (have_lasx(cpu_flags)) {
-        if (c->srcRange != c->dstRange && !isAnyRGB(c->dstFormat)) {
             if (c->dstBpc <= 14) {
                 if (c->srcRange) {
                     c->lumConvertRange = lumRangeFromJpeg_lasx;
@@ -53,7 +50,6 @@ av_cold void ff_sws_init_range_convert_loongarch(SwsInternal *c)
                     c->chrConvertRange = chrRangeToJpeg_lasx;
                 }
             }
-        }
     }
 #endif // #if HAVE_LASX
 }

libswscale/riscv/swscale.c

@@ -39,8 +39,7 @@ av_cold void ff_sws_init_range_convert_riscv(SwsInternal *c)
         { ff_range_lum_from_jpeg_16_rvv, ff_range_chr_from_jpeg_16_rvv },
     };
 
-    if (c->srcRange != c->dstRange && !isAnyRGB(c->dstFormat) &&
-        c->dstBpc <= 14 &&
+    if (c->dstBpc <= 14 &&
         (flags & AV_CPU_FLAG_RVV_I32) && (flags & AV_CPU_FLAG_RVB)) {
         bool from = c->srcRange != 0;
 

libswscale/swscale.c

@@ -562,7 +562,6 @@ av_cold void ff_sws_init_range_convert(SwsInternal *c)
                 c->chrConvertRange = chrRangeToJpeg16_c;
             }
         }
-    }
 
 #if ARCH_AARCH64
     ff_sws_init_range_convert_aarch64(c);
@@ -573,6 +572,7 @@ av_cold void ff_sws_init_range_convert(SwsInternal *c)
 #elif ARCH_X86
     ff_sws_init_range_convert_x86(c);
 #endif
+    }
 }
 
 static av_cold void sws_init_swscale(SwsInternal *c)

libswscale/x86/swscale.c

@@ -474,14 +474,12 @@ RANGE_CONVERT_FUNCS_DECL(avx2);
 
 av_cold void ff_sws_init_range_convert_x86(SwsInternal *c)
 {
-    if (c->srcRange != c->dstRange && !isAnyRGB(c->dstFormat)) {
         int cpu_flags = av_get_cpu_flags();
         if (EXTERNAL_AVX2_FAST(cpu_flags)) {
             RANGE_CONVERT_FUNCS(avx2);
         } else if (EXTERNAL_SSE2(cpu_flags)) {
             RANGE_CONVERT_FUNCS(sse2);
         }
-    }
 }
 
 av_cold void ff_sws_init_swscale_x86(SwsInternal *c)