[ARM] spelling fixes

Spelling fixes in arch/arm/.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/plat-s3c24xx/dma.c b/arch/arm/plat-s3c24xx/dma.c
index 6f03c93..08d80f2 100644
--- a/arch/arm/plat-s3c24xx/dma.c
+++ b/arch/arm/plat-s3c24xx/dma.c
@@ -1153,7 +1153,7 @@
  *
  * hwcfg:     the value for xxxSTCn register,
  *            bit 0: 0=increment pointer, 1=leave pointer
- *            bit 1: 0=soucre is AHB, 1=soucre is APB
+ *            bit 1: 0=source is AHB, 1=source is APB
  *
  * devaddr:   physical address of the source
 */