arm: Don't include common.h in header files

It is bad practice to include common.h in other header files since it can
bring in any number of superfluous definitions. It implies that some C
files don't include it and thus may be missing CONFIG options that are set
up by that file. The C files should include these themselves.

Update some header files in arch/arm to drop this.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/net.h b/include/net.h
index 82500ee..774ae2d 100644
--- a/include/net.h
+++ b/include/net.h
@@ -15,9 +15,13 @@
 #include <asm/cache.h>
 #include <asm/byteorder.h>	/* for nton* / ntoh* stuff */
 #include <env.h>
+#include <log.h>
+#include <time.h>
 #include <linux/if_ether.h>
 #include <rand.h>
 
+struct cmd_tbl_s;
+
 #define DEBUG_LL_STATE 0	/* Link local state machine changes */
 #define DEBUG_DEV_PKT 0		/* Packets or info directed to the device */
 #define DEBUG_NET_PKT 0		/* Packets on info on the network at large */
@@ -59,7 +63,7 @@
  * @argv: List of arguments
  * @return result (see enum command_ret_t)
  */
-int do_tftpb(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]);
+int do_tftpb(struct cmd_tbl_s *cmdtp, int flag, int argc, char *const argv[]);
 
 /**
  * An incoming packet handler.