configs: Rename environment variable fit_loadaddr to addr_fit

This is the first part of a larger effort I would like to propose to
unify and simplify the default set of environment variables.

When many early environment variables were named there were fewer images
being loaded, usually just a kernel. At this time names like 'loadaddr'
would suffice. Now we have more images and many more commands that act on
them, often re-using the same variable for several different uses. The
contents of a variable are also not immediately known causing one to have
to look up a chain of variables to understand what a command is actually
doing. I suggest the following.

To start, all variables containing names should be prefixed with name_
and addresses with addr_. This is like how K2 already does things and
allows for simple universal commands like:

get_fdt_nfs=nfs ${addr_fdt} /boot/${name_fdt}

Which is very clear on what is intended here and would work across all
board that using the this naming convention.

We can do this one variable at a time, start here with addr_fit.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Acked-by: Andreas Dannenberg <dannenberg@ti.com>
diff --git a/include/configs/ti_armv7_common.h b/include/configs/ti_armv7_common.h
index 828fb1b..ece329f 100644
--- a/include/configs/ti_armv7_common.h
+++ b/include/configs/ti_armv7_common.h
@@ -52,9 +52,9 @@
 
 #define DEFAULT_FIT_TI_ARGS \
 	"boot_fit=0\0" \
-	"fit_loadaddr=0x90000000\0" \
+	"addr_fit=0x90000000\0" \
 	"fit_bootfile=fitImage\0" \
-	"update_to_fit=setenv loadaddr ${fit_loadaddr}; setenv bootfile ${fit_bootfile}\0" \
+	"update_to_fit=setenv loadaddr ${addr_fit}; setenv bootfile ${fit_bootfile}\0" \
 	"loadfit=run args_mmc; bootm ${loadaddr}#${fdtfile};\0" \
 
 /*