sh: Fix FPU config option

Change to UCLIBC_HAS_FPU because UCLIBC_HAS_FLOATS can be used with
UCLIBC_HAS_SOFT_FLOAT option.

Rules.mak

@@ -371,7 +371,7 @@ ifeq ($(TARGET_ARCH),sh)
 	CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
 	CPU_CFLAGS-$(CONFIG_SH2)+=-m2
 	CPU_CFLAGS-$(CONFIG_SH3)+=-m3
-ifeq ($(UCLIBC_HAS_FLOATS),y)
+ifeq ($(UCLIBC_HAS_FPU),y)
 	CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
 	CPU_CFLAGS-$(CONFIG_SH4)+=-m4
 else