Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/arch/mips/sgi-ip27/ip27-init.c b/arch/mips/sgi-ip27/ip27-init.c
index 51d3a4f..923c080 100644
--- a/arch/mips/sgi-ip27/ip27-init.c
+++ b/arch/mips/sgi-ip27/ip27-init.c
@@ -93,7 +93,7 @@
 
 	/*
 	 * Some interrupts are reserved by hardware or by software convention.
-	 * Mark these as reserved right away so they won't be used accidently
+	 * Mark these as reserved right away so they won't be used accidentally
 	 * later.
 	 */
 	for (i = 0; i <= BASE_PCI_IRQ; i++) {