GCC Makefile defines march=i80286 for 386 build?

[boeckmann]

In the following the makefile sets the CPU to a 286 when performing a 386 build with I16-GCC. As I16-GCC does not seem to support march=i386, wouldn't it be better to throw an error and only allow up to XCPU=286 with a matching march=i80286 for I16-GCC?

kernel/mkfiles/gcc.mak

Lines 17 to 20 in 032523a

	ifeq ($(XCPU),386)
	TARGETOPT=-march=i80286
	ALLCFLAGS+=-DI386
	endif