sh: sh2a: Add sh2a optimize to config.mk

Only the optimization of sh2 had been supported up.
This adds the optimization of sh2a.

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

arch/sh/cpu/sh2/config.mk

@@ -23,6 +23,11 @@
 #
 ENDIANNESS += -EB
 
+ifdef CONFIG_SH2A
+PLATFORM_CPPFLAGS += -m2a -m2a-nofpu -mb -mno-fdpic -ffreestanding
+else # SH2
 PLATFORM_CPPFLAGS += -m3e -mb
+endif
+
 PLATFORM_RELFLAGS += -ffixed-r13
 PLATFORM_LDFLAGS += $(ENDIANNESS)