[ARM] 4449/1: more entries in arch/arm/boot/.gitignore

Signed-off-by: Nicolas Pitre <npitre@mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/boot/.gitignore

@@ -1,2 +1,5 @@
 Image
 zImage
+xipImage
+bootpImage
+uImage