pm: dpmc macro typo fix

Signed-off-by: Steven Miao <realmz6@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>

arch/blackfin/include/asm/dpmc.h

@@ -280,7 +280,7 @@
 	PM_POP_SYNC(9)
 #endif
 
-#ifdef EBIU_AMBCTL
+#ifdef EBIU_AMGCTL
 	PM_SYS_POP(9, EBIU_AMBCTL1)
 	PM_SYS_POP(8, EBIU_AMBCTL0)
 	PM_SYS_POP16(7, EBIU_AMGCTL)