[MIPS] PNX: Fix modpost warnings.

  MODPOST vmlinux
WARNING: arch/mips/philips/pnx8550/common/built-in.o(.text+0xd40): Section mismatch: reference to .init.data: (after 'pnx8550_platform_init')
WARNING: arch/mips/philips/pnx8550/common/built-in.o(.text+0xd44): Section mismatch: reference to .init.data: (after 'pnx8550_platform_init')
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/philips/pnx8550/common/platform.c

@@ -123,7 +123,7 @@ static struct platform_device *pnx8550_platform_devices[] __initdata = {
 	&pnx8550_uart_device,
 };
 
-int pnx8550_platform_init(void)
+static int __init pnx8550_platform_init(void)
 {
 	return platform_add_devices(pnx8550_platform_devices,
 			            ARRAY_SIZE(pnx8550_platform_devices));