[U-Boot] [PATCH] mmc: add missing prototype for mmc_get_env_dev

[Clemens Gruber]

This is a follow-up patch to e92029c0f4 and adds a prototype for
the weak mmc_get_env_dev function.

Cc: Tom Rini <trini at konsulko.com>
Cc: Stephen Warren <swarren at nvidia.com>

Signed-off-by: Clemens Gruber <clemens.gruber at pqgruber.com>
---
 include/mmc.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/mmc.h b/include/mmc.h
index 465daeb..d652c14 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -479,6 +479,7 @@ void board_mmc_power_init(void);
 int board_mmc_init(bd_t *bis);
 int cpu_mmc_init(bd_t *bis);
 int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr);
+int mmc_get_env_dev(void);
 
 struct pci_device_id;
 
-- 
2.7.0