treewide: replace #include <asm-generic/errno.h> with <linux/errno.h>

Now, include/linux/errno.h is a wrapper of <asm-generic/errno.h>.
Replace all include directives for <asm-generic/errno.h> with
<linux/errno.h>.

<asm-generic/...> is supposed to be included from <asm/...> when
arch-headers fall back into generic implementation. Generally, they
should not be directly included from .c files.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
[trini: Add drivers/usb/host/xhci-rockchip.c]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index 921537f..8c1774e 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -39,7 +39,7 @@
 #include <asm/io.h>
 #include <asm/dma-mapping.h>
 #include <asm/arch/clk.h>
-#include <asm-generic/errno.h>
+#include <linux/errno.h>
 
 #include "macb.h"