ARM: 7090/1: CACHE-L2X0: filter start address can be 0 and is often 0

this patch fixes the error in Rob Herring's
ARM: 7009/1: l2x0: Add OF based initialization
http://www.spinics.net/lists/arm-kernel/msg131123.html
it has been in rmk/for-next with commit 41c86ff5b

Cc: Shawn Guo <[e-mail]>
Cc: Arnd Bergmann <[e-mail]>
Signed-off-by: Barry Song <[e-mail]>
Acked-by: Rob Herring <[e-mail]>
Signed-off-by: Russell King <[e-mail]>

arch/arm/mm/cache-l2x0.c

···
 
 	of_property_read_u32_array(np, "arm,filter-ranges",
 				   filter, ARRAY_SIZE(filter));
-	if (filter[0] && filter[1]) {
+	if (filter[1]) {
 		writel_relaxed(ALIGN(filter[0] + filter[1], SZ_1M),
 			       l2x0_base + L2X0_ADDR_FILTER_END);
 		writel_relaxed((filter[0] & ~(SZ_1M - 1)) | L2X0_ADDR_FILTER_EN,