blit: Check MSVC's `_M_ARM64` define in addition to `__aarch64__`.

Reference Issue #14519.

(cherry picked from commit 7f0d0d00469ab50f71358d3b8705a64084f2ef48)

src/video/SDL_blit_N.c

@@ -2719,7 +2719,7 @@ static void SDL_TARGETING("avx2") Blit8888to8888PixelSwizzleAVX2(SDL_BlitInfo *i
 
 #endif
 
-#if defined(SDL_NEON_INTRINSICS) && (__ARM_ARCH >= 8) && defined(__aarch64__)
+#if defined(SDL_NEON_INTRINSICS) && (__ARM_ARCH >= 8) && (defined(__aarch64__) || defined(_M_ARM64))
 
 static void Blit8888to8888PixelSwizzleNEON(SDL_BlitInfo *info)
 {
@@ -3135,7 +3135,7 @@ SDL_BlitFunc SDL_CalculateBlitN(SDL_Surface *surface)
                 return Blit8888to8888PixelSwizzleSSE41;
             }
 #endif
-#if defined(SDL_NEON_INTRINSICS) && (__ARM_ARCH >= 8) && defined(__aarch64__)
+#if defined(SDL_NEON_INTRINSICS) && (__ARM_ARCH >= 8) && (defined(__aarch64__) || defined(_M_ARM64))
             return Blit8888to8888PixelSwizzleNEON;
 #endif
         }