mips: Fix spacing issue

Fix some indentation issues and remove the following checkpatch issue:
- ERROR: need consistent spacing around '-' (ctx:WxV)

Co-Developed-by: Ladislav Michl <oss-lists@triops.cz>
Signed-off-by: Franziska Naepelt <franziska.naepelt@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/sibyte/swarm/platform.c

@@ -90,7 +90,7 @@ device_initcall(swarm_pata_init);
 		.name = "SB1250 MAC " __stringify(num),		\
 		.flags = IORESOURCE_MEM,			\
 		.start = A_MAC_CHANNEL_BASE(num),		\
-		.end = A_MAC_CHANNEL_BASE(num + 1) -1,	\
+		.end = A_MAC_CHANNEL_BASE(num + 1) - 1,		\
 	};\
 	static struct platform_device sb1250_dev##num = {	\
 		.name = "sb1250-mac",				\