m68k: atari - Rename "mfp" to "st_mfp"

http://kisskb.ellerman.id.au/kisskb/buildresult/72115/:
| net/mac80211/ieee80211_i.h:327: error: syntax error before 'volatile'
| net/mac80211/ieee80211_i.h:350: error: syntax error before '}' token
| net/mac80211/ieee80211_i.h:455: error: field 'sta' has incomplete type
| distcc[19430] ERROR: compile net/mac80211/main.c on sprygo/32 failed

This is caused by

| # define mfp ((*(volatile struct MFP*)MFP_BAS))

in arch/m68k/include/asm/atarihw.h, which conflicts with the new "mfp" enum in
net/mac80211/ieee80211_i.h.

Rename "mfp" to "st_mfp", as it's a way too generic name for a global #define.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/m68k/atari/ataints.c b/arch/m68k/atari/ataints.c
index dba4afa..39478dd 100644
--- a/arch/m68k/atari/ataints.c
+++ b/arch/m68k/atari/ataints.c
@@ -187,8 +187,8 @@
 "	jbra	ret_from_interrupt\n"					   \
 	 : : "i" (&kstat_cpu(0).irqs[n+8]), "i" (&irq_handler[n+8]),	   \
 	     "n" (PT_OFF_SR), "n" (n),					   \
-	     "i" (n & 8 ? (n & 16 ? &tt_mfp.int_mk_a : &mfp.int_mk_a)	   \
-		        : (n & 16 ? &tt_mfp.int_mk_b : &mfp.int_mk_b)),	   \
+	     "i" (n & 8 ? (n & 16 ? &tt_mfp.int_mk_a : &st_mfp.int_mk_a)   \
+		        : (n & 16 ? &tt_mfp.int_mk_b : &st_mfp.int_mk_b)), \
 	     "m" (preempt_count()), "di" (HARDIRQ_OFFSET)		   \
 );									   \
 	for (;;);			/* fake noreturn */		   \
@@ -366,14 +366,14 @@
 	/* Initialize the MFP(s) */
 
 #ifdef ATARI_USE_SOFTWARE_EOI
-	mfp.vec_adr  = 0x48;	/* Software EOI-Mode */
+	st_mfp.vec_adr  = 0x48;	/* Software EOI-Mode */
 #else
-	mfp.vec_adr  = 0x40;	/* Automatic EOI-Mode */
+	st_mfp.vec_adr  = 0x40;	/* Automatic EOI-Mode */
 #endif
-	mfp.int_en_a = 0x00;	/* turn off MFP-Ints */
-	mfp.int_en_b = 0x00;
-	mfp.int_mk_a = 0xff;	/* no Masking */
-	mfp.int_mk_b = 0xff;
+	st_mfp.int_en_a = 0x00;	/* turn off MFP-Ints */
+	st_mfp.int_en_b = 0x00;
+	st_mfp.int_mk_a = 0xff;	/* no Masking */
+	st_mfp.int_mk_b = 0xff;
 
 	if (ATARIHW_PRESENT(TT_MFP)) {
 #ifdef ATARI_USE_SOFTWARE_EOI