sram warning fix

CC      arch/arm/mach-davinci/sram.o
arch/arm/mach-davinci/sram.c: In function 'sram_init':
arch/arm/mach-davinci/sram.c:63: warning: comparison of distinct pointer types lacks a cast
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Kevin Hilman <khilman@ti.deeprootsystems.com>

arch/arm/mach-davinci/sram.c

@@ -60,7 +60,7 @@ static int __init sram_init(void)
 	int status = 0;
 
 	if (len) {
-		len = min(len, SRAM_SIZE);
+		len = min_t(unsigned, len, SRAM_SIZE);
 		sram_pool = gen_pool_create(ilog2(SRAM_GRANULARITY), -1);
 		if (!sram_pool)
 			status = -ENOMEM;