[U-Boot] use of C99

I was wondering if there was any reason we avoid C99 features in u- boot source.

Specifically the ability to declare variables in the middle of functions.

There are a slew of places that we have something like:

foobar() { ...

#ifdef CONFIG_COOL_FEATURE u32 myvarrocks; #endif

...

#ifdef CONFIG_COOL_FEATURE myvarrocks = foo * bar * bar;

gd->neato = myvarrocks #endif

it would be nice to just have:

foobar() {

...

#ifdef CONFIG_COOL_FEATURE u32 myvarrocks = foo * bar * bar;

gd->neato = myvarrocks #endif

- k