package/pkg-meson: fix meson cpu_family format

meson requires a custom cpu_family format
https://mesonbuild.com/Reference-tables.html#cpu-families

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Reviewed-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/pkg-meson.mk

@@ -64,7 +64,7 @@ define $(2)_CONFIGURE_CMDS
 	rm -rf $$($$(PKG)_SRCDIR)/build
 	mkdir -p $$($$(PKG)_SRCDIR)/build
 	sed -e "s%@TARGET_CROSS@%$$(TARGET_CROSS)%g" \
-	    -e "s%@TARGET_ARCH@%$$(ARCH)%g" \
+	    -e "s%@TARGET_ARCH@%$$(HOST_MESON_TARGET_CPU_FAMILY)%g" \
 	    -e "s%@TARGET_CPU@%$$(GCC_TARGET_CPU)%g" \
 	    -e "s%@TARGET_ENDIAN@%$$(call LOWERCASE,$$(BR2_ENDIAN))%g" \
 	    -e "s%@TARGET_CFLAGS@%$$(HOST_MESON_SED_CFLAGS)%g" \