common: Drop net.h from common header

Move this header out of the common header. Network support is used in
quite a few places but it still does not warrant blanket inclusion.

Note that this net.h header itself has quite a lot in it. It could be
split into the driver-mode support, functions, structures, checksumming,
etc.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/cpu/arm926ejs/cache.c b/arch/arm/cpu/arm926ejs/cache.c
index 7b7eaaf..acab9bc 100644
--- a/arch/arm/cpu/arm926ejs/cache.c
+++ b/arch/arm/cpu/arm926ejs/cache.c
@@ -4,6 +4,7 @@
  * Ilya Yanok, EmCraft Systems
  */
 #include <cpu_func.h>
+#include <asm/cache.h>
 #include <linux/types.h>
 #include <common.h>
 
diff --git a/arch/arm/cpu/arm926ejs/cpu.c b/arch/arm/cpu/arm926ejs/cpu.c
index 6ab320d..93d7a02 100644
--- a/arch/arm/cpu/arm926ejs/cpu.c
+++ b/arch/arm/cpu/arm926ejs/cpu.c
@@ -16,6 +16,7 @@
 #include <command.h>
 #include <cpu_func.h>
 #include <irq_func.h>
+#include <asm/cache.h>
 #include <asm/system.h>
 
 static void cache_flush(void);
diff --git a/arch/arm/cpu/arm926ejs/mx25/generic.c b/arch/arm/cpu/arm926ejs/mx25/generic.c
index 09bda0e..ef8d2d2 100644
--- a/arch/arm/cpu/arm926ejs/mx25/generic.c
+++ b/arch/arm/cpu/arm926ejs/mx25/generic.c
@@ -11,6 +11,7 @@
 #include <common.h>
 #include <clock_legacy.h>
 #include <div64.h>
+#include <net.h>
 #include <netdev.h>
 #include <vsprintf.h>
 #include <asm/io.h>
diff --git a/arch/arm/cpu/arm926ejs/mx27/generic.c b/arch/arm/cpu/arm926ejs/mx27/generic.c
index 9bed0e9..a003ab8 100644
--- a/arch/arm/cpu/arm926ejs/mx27/generic.c
+++ b/arch/arm/cpu/arm926ejs/mx27/generic.c
@@ -6,6 +6,7 @@
 
 #include <common.h>
 #include <div64.h>
+#include <net.h>
 #include <netdev.h>
 #include <vsprintf.h>
 #include <asm/io.h>
diff --git a/arch/arm/cpu/arm926ejs/mxs/mxs.c b/arch/arm/cpu/arm926ejs/mxs/mxs.c
index 16c080a..f65053c 100644
--- a/arch/arm/cpu/arm926ejs/mxs/mxs.c
+++ b/arch/arm/cpu/arm926ejs/mxs/mxs.c
@@ -12,6 +12,7 @@
 #include <common.h>
 #include <cpu_func.h>
 #include <hang.h>
+#include <net.h>
 #include <linux/errno.h>
 #include <asm/io.h>
 #include <asm/arch/clock.h>