SMDK5250: fix compiler warning

this patch fixed following warning.
tzpc_init.c: In function 'tzpc_init':
tzpc_init.c:35: warning: assignment from incompatible pointer type

Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Cc: Chander Kashyap <chander.kashyap@linaro.org>

board/samsung/smdk5250/tzpc_init.c

@@ -32,7 +32,7 @@ void tzpc_init(void)
 	unsigned int addr;
 
 	for (addr = TZPC0_BASE; addr <= TZPC9_BASE; addr += TZPC_BASE_OFFSET) {
-		tzpc = (struct exynos5_tzpc *)addr;
+		tzpc = (struct exynos_tzpc *)addr;
 
 		if (addr == TZPC0_BASE)
 			writel(R0SIZE, &tzpc->r0size);