sparc: fix format string argument for prom_printf()

prom_printf() takes printf style arguments.  Specifing GCC's format
attribute reveals that there are several wrong usages of prom_printf().

This fixes those wrong format strings and arguments, and also leaves
format attributes in order to detect similar mistakes at compile time.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: sparclinux@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/kernel/traps_64.c b/arch/sparc/kernel/traps_64.c
index 3b05e66..fa1f1d3 100644
--- a/arch/sparc/kernel/traps_64.c
+++ b/arch/sparc/kernel/traps_64.c
@@ -850,7 +850,7 @@
 	ecache_flush_physbase = find_ecache_flush_span(ecache_flush_size);
 
 	if (ecache_flush_physbase == ~0UL) {
-		prom_printf("cheetah_ecache_flush_init: Cannot find %d byte "
+		prom_printf("cheetah_ecache_flush_init: Cannot find %ld byte "
 			    "contiguous physical memory.\n",
 			    ecache_flush_size);
 		prom_halt();