Fix gmake build of ARM64 DYNAMIC_ARCH on hosts lacking SVE (#5816)

* Add march=armv8.4-a+sve(+bf16) to non-PGI options for SVE-capable ARM64 targets

Author: martin-frbg

kernel/Makefile

@@ -97,11 +97,11 @@ else ifeq ($(TARGET_CORE), ZEN)
  override CFLAGS += -DBUILD_KERNEL -DTABLE_NAME=gotoblas_$(TARGET_CORE) $(AVX2OPT)
 else ifeq ($(TARGET_CORE), LOONGSON3R4)
  override CFLAGS += -DBUILD_KERNEL -DTABLE_NAME=gotoblas_$(TARGET_CORE) $(MSA_FLAGS)
-else ifneq ($(filter NEOVERSEN2 NEOVERSEV1, $(TARGET_CORE)),)
+else ifneq ($(filter NEOVERSEN2 NEOVERSEV1 ARMV8SVE A64FX, $(TARGET_CORE)),)
  ifeq ($(C_COMPILER), PGI)
   override CFLAGS += -DBUILD_KERNEL -DTABLE_NAME=gotoblas_$(TARGET_CORE) -Msve_intrinsics
  else
-  override CFLAGS += -DBUILD_KERNEL -DTABLE_NAME=gotoblas_$(TARGET_CORE)
+  override CFLAGS += -DBUILD_KERNEL -DTABLE_NAME=gotoblas_$(TARGET_CORE) -march=armv8.4-a+sve+bf16
  endif
 else
  override CFLAGS += -DBUILD_KERNEL -DTABLE_NAME=gotoblas_$(TARGET_CORE)