env: Move env_get() to env.h

Move env_get() over to the new header file.

Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/powerpc/cpu/mpc85xx/mp.c b/arch/powerpc/cpu/mpc85xx/mp.c
index 119d4b3..3882c95 100644
--- a/arch/powerpc/cpu/mpc85xx/mp.c
+++ b/arch/powerpc/cpu/mpc85xx/mp.c
@@ -6,6 +6,7 @@
 #include <common.h>
 #include <env.h>
 #include <asm/processor.h>
+#include <env.h>
 #include <ioports.h>
 #include <lmb.h>
 #include <asm/io.h>
diff --git a/arch/powerpc/lib/bootm.c b/arch/powerpc/lib/bootm.c
index 15e9c2a..52bcd4e 100644
--- a/arch/powerpc/lib/bootm.c
+++ b/arch/powerpc/lib/bootm.c
@@ -8,6 +8,7 @@
 
 
 #include <common.h>
+#include <env.h>
 #include <watchdog.h>
 #include <command.h>
 #include <image.h>