m68k: make fp register stores consistent for m68k and ColdFire

There is no reason we can't make the saved fp registers the same for all
m68k types and ColdFire. There is a little wasted space, but the code
consistency and cleanliness is a big win.

sigcontext.h is an exported header, but currently there is no in-mainline
users of the !__uClinux__ and __mcoldfire__ case that this change effects.
Even better this change actually makes this structure consistent with
the out-of-mainline ColdFire/MMU code.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>

arch/m68k/include/asm/sigcontext.h

@@ -15,11 +15,7 @@ struct sigcontext {
 	unsigned long  sc_pc;
 	unsigned short sc_formatvec;
 #ifndef __uClinux__
-# ifdef __mcoldfire__
-	unsigned long  sc_fpregs[2][2];	/* room for two fp registers */
-# else
 	unsigned long  sc_fpregs[2*3];  /* room for two fp registers */
-# endif
 	unsigned long  sc_fpcntl[3];
 	unsigned char  sc_fpstate[216];
 #endif

arch/m68k/include/asm/ucontext.h

@@ -7,11 +7,7 @@ typedef greg_t gregset_t[NGREG];
 
 typedef struct fpregset {
 	int f_fpcntl[3];
-#ifdef __mcoldfire__
-	int f_fpregs[8][2];
-#else
 	int f_fpregs[8*3];
-#endif
 } fpregset_t;
 
 struct mcontext {