[PATCH] ARM: kirkwood: add missing <linux/if_ether.h> for ETH_ALEN

[Daniel Golle]

After commit 83216e3988cd1 ("of: net: pass the dst buffer to
of_get_mac_address()") build fails for kirkwood as ETH_ALEN is not
defined.

arch/arm/mach-mvebu/kirkwood.c: In function 'kirkwood_dt_eth_fixup':
arch/arm/mach-mvebu/kirkwood.c:87:13: error: 'ETH_ALEN' undeclared (first use in this function); did you mean 'ESTALE'?
   u8 tmpmac[ETH_ALEN];
             ^~~~~~~~
             ESTALE
arch/arm/mach-mvebu/kirkwood.c:87:13: note: each undeclared identifier is reported only once for each function it appears in
arch/arm/mach-mvebu/kirkwood.c:87:6: warning: unused variable 'tmpmac' [-Wunused-variable]
   u8 tmpmac[ETH_ALEN];
      ^~~~~~
make[5]: *** [scripts/Makefile.build:262: arch/arm/mach-mvebu/kirkwood.o] Error 1
make[5]: *** Waiting for unfinished jobs....

Add missing #include <linux/if_ether.h> to fix this.

Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Andrew Lunn <andrew@xxxxxxx>
Cc: Michael Walle <michael@xxxxxxxx>
Reported-by: https://buildbot.openwrt.org/master/images/#/builders/56/builds/220/steps/44/logs/stdio
Fixes: 83216e3988cd1 ("of: net: pass the dst buffer to of_get_mac_address()")
Signed-off-by: Daniel Golle <daniel@xxxxxxxxxxxxxx>
---
 arch/arm/mach-mvebu/kirkwood.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-mvebu/kirkwood.c b/arch/arm/mach-mvebu/kirkwood.c
index 06b1706595f4c..a493a896e6ee3 100644
--- a/arch/arm/mach-mvebu/kirkwood.c
+++ b/arch/arm/mach-mvebu/kirkwood.c
@@ -14,6 +14,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/mbus.h>
+#include <linux/if_ether.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_net.h>
-- 
2.32.0