Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/arch/arm/mach-omap2/omap_phy_internal.c b/arch/arm/mach-omap2/omap_phy_internal.c
index e2e605f..05f6abc 100644
--- a/arch/arm/mach-omap2/omap_phy_internal.c
+++ b/arch/arm/mach-omap2/omap_phy_internal.c
@@ -112,12 +112,12 @@
 		else
 			/*
 			 * Enable VBUS Valid, AValid and IDDIG
-			 * high impedence
+			 * high impedance
 			 */
 			__raw_writel(IDDIG | AVALID | VBUSVALID,
 						ctrl_base + USBOTGHS_CONTROL);
 	} else {
-		/* Enable session END and IDIG to high impedence. */
+		/* Enable session END and IDIG to high impedance. */
 		__raw_writel(SESSEND | IDDIG, ctrl_base +
 					USBOTGHS_CONTROL);
 	}