Blackfin: BF51x: fix typo in HWAIT pin define

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

arch/blackfin/mach-bf518/include/mach/portmux.h

@@ -195,6 +195,6 @@
 #define P_AMS2			(P_DEFINED | P_IDENT(GPIO_PG11) | P_FUNCT(1))
 #define P_AMS3			(P_DEFINED | P_IDENT(GPIO_PG15) | P_FUNCT(2))
 
-#define P_HWAIT			(P_DEFINED | P_IDENT(GPIO_PG000000000) | P_FUNCT(1))
+#define P_HWAIT			(P_DEFINED | P_IDENT(GPIO_PG0) | P_FUNCT(1))
 
 #endif				/* _MACH_PORTMUX_H_ */