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/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c
index f934948..5b2ff81 100644
--- a/lib/efi_loader/efi_device_path.c
+++ b/lib/efi_loader/efi_device_path.c
@@ -8,6 +8,7 @@
 #include <common.h>
 #include <blk.h>
 #include <dm.h>
+#include <net.h>
 #include <usb.h>
 #include <mmc.h>
 #include <nvme.h>
diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c
index c0cf1d9..44b8a2e 100644
--- a/lib/efi_loader/efi_memory.c
+++ b/lib/efi_loader/efi_memory.c
@@ -11,6 +11,7 @@
 #include <malloc.h>
 #include <mapmem.h>
 #include <watchdog.h>
+#include <asm/cache.h>
 #include <linux/list_sort.h>
 #include <linux/sizes.h>
 
diff --git a/lib/efi_loader/efi_net.c b/lib/efi_loader/efi_net.c
index 82d2595..22f0123 100644
--- a/lib/efi_loader/efi_net.c
+++ b/lib/efi_loader/efi_net.c
@@ -18,6 +18,7 @@
 #include <common.h>
 #include <efi_loader.h>
 #include <malloc.h>
+#include <net.h>
 
 static const efi_guid_t efi_net_guid = EFI_SIMPLE_NETWORK_PROTOCOL_GUID;
 static const efi_guid_t efi_pxe_base_code_protocol_guid =