Revert "ColdFire: Get information from the correct GCC"

This reverts commit b7166e05a513c0806b63b9dfb6f1d77645cede2a
(replaced by commit c4e5f52a58d278eebb87f476e353972c5dacea40).
diff --git a/cpu/mcf547x_8x/config.mk b/cpu/mcf547x_8x/config.mk
index eb6b50b..e5f4385 100644
--- a/cpu/mcf547x_8x/config.mk
+++ b/cpu/mcf547x_8x/config.mk
@@ -24,7 +24,7 @@
 #
 
 PLATFORM_RELFLAGS += -ffixed-d7 -msep-data
-ifeq ($(findstring 4.2,$(shell $(CROSS_COMPILE)gcc --version)),4.2)
+ifeq ($(findstring 4.2,$(shell $(CC) --version)),4.2)
 PLATFORM_CPPFLAGS += -mcpu=5485 -fPIC
 else
 PLATFORM_CPPFLAGS += -m5407 -fPIC