ARM: uniphier: remove #include <net.h> again from micro-support-card.c

I do not understand the changes made to this file by
commit 90526e9fba ("common: Drop net.h from common header").

  git show 90526e9fba -- arch/arm/mach-uniphier/micro-support-card.c

The necessary declaration is already included by <netdev.h> at line 112.
It also moved the <dm/of.h> inclusion, but I do not understand the
motivation of doing so, either.

Simply revert the changes made to this file.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

arch/arm/mach-uniphier/micro-support-card.c

@@ -6,10 +6,9 @@
  */
 
 #include <common.h>
+#include <dm/of.h>
 #include <fdt_support.h>
 #include <log.h>
-#include <net.h>
-#include <dm/of.h>
 #include <linux/ctype.h>
 #include <linux/delay.h>
 #include <linux/io.h>