Merge pull request #3953 from pratham-mcw:fix/bgsegm-lsbp-arm-failure

bgsegm: Enable __popcnt intrinsic for MSVC on ARM to fix LSBP test failure

Author: asmorkalov

modules/bgsegm/src/bgfg_gsoc.cpp

@@ -70,7 +70,7 @@ const float LSBPtau = 0.05f;
 inline int LSBPDist32(unsigned n) {
 #if defined(__GNUC__) || defined(__clang__)
     return __builtin_popcount(n);
-#elif defined(_MSC_VER) && !(defined(_M_ARM) || defined(_M_ARM64))
+#elif defined(_MSC_VER)
     return __popcnt(n);
 #else
     // Taken from http://graphics.stanford.edu/~seander/bithacks.html#CountBitsSetParallel