Split VORTEXM4 from VORTEX target and fix SGEMM_DIRECT support for SME-capable targets #2346

Job	Run time
TEST (LA64_GENERIC, loongarch64-linux-gnu, NO_SHARED=1 DYNAMIC_ARCH=1 TARGET=LA64_GENERIC)	13m 37s
TEST (LOONGSON3R5, loongarch64-linux-gnu, NO_SHARED=1 DYNAMIC_ARCH=1 TARGET=LOONGSON3R5)	14m 8s
TEST (LA264, loongarch64-linux-gnu, NO_SHARED=1 DYNAMIC_ARCH=1 TARGET=LA264)	13m 37s
TEST (LOONGSON2K1000, loongarch64-linux-gnu, NO_SHARED=1 DYNAMIC_ARCH=1 TARGET=LOONGSON2K1000)	13m 29s
TEST (DYNAMIC_ARCH, loongarch64-linux-gnu, NO_SHARED=1 DYNAMIC_ARCH=1 TARGET=GENERIC)	17m 11s
TEST (LOONGSONGENERIC, loongarch64-linux-gnu, NO_SHARED=1 DYNAMIC_ARCH=1 TARGET=LOONGSONGENERIC)	15m 11s
TEST (LA464, loongarch64-linux-gnu, NO_SHARED=1 DYNAMIC_ARCH=1 TARGET=LA464)	14m 10s
	1h 41m 23s

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