load_addr: move to common env code

Rather than keep the load_addr definition with the bootm code (which
just happens to use this), move it to the common env code.  This way
we can disable bootm support completely while retaining load_addr
usage with many other commands.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

common/cmd_bootm.c

diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index 9873ee7..18019d6 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -156,7 +156,6 @@
 #endif
 };
 
-ulong load_addr = CONFIG_SYS_LOAD_ADDR;	/* Default Load Address */
 static bootm_headers_t images;		/* pointers to os/initrd/fdt images */
 
 /* Allow for arch specific config before we boot */

common/cmd_nvedit.c

diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index f8c7976..fb69c24 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -76,6 +76,8 @@
  */
 #define	MAX_ENV_SIZE	(1 << 20)	/* 1 MiB */
 
+ulong load_addr = CONFIG_SYS_LOAD_ADDR;	/* Default Load Address */
+
 /*
  * Table with supported baudrates (defined in config_xyz.h)
  */