include: Further cleanup includes

Add some missing headers such as <linux/errno.h> or <linux/types.h> or
<linux/kernel.h> to header files that make direct usage of things
provided by these headers.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>

include/rtc.h

@@ -16,6 +16,7 @@
 #include <bcd.h>
 #include <rtc_def.h>
 #include <linux/errno.h>
+#include <linux/types.h>
 
 typedef int64_t time64_t;
 struct udevice;