[U-Boot] kgdb: Remove first_entry for kgdb

[Tom Rini]

On Mon, Sep 01, 2014 at 09:48:07PM +0800, Peng Fan wrote:

> There are two ways to run into handle_exception, run command 'kgdb' and
> encounter a breakpoint which triggers exception handling.
> 
> The origin source code only saves regs when first run command 'kgdb'.
> Take the following for example, When run 'kgdb', regs is saved to entry_regs.
> When run 'bootz', regs is not saved. However, if we set a breakpoint, then
> continue. When breakpoint is reached, run `quit`, and Now return to the
> instruction which follows kgdb, but not bootz.This may cause errors. So,
> save regs for each handle_exception call to return to the correct place.
> Example:
> Target      |    Host
> =>kgdb      |    (gdb)b bootz
>             |    (gdb)c
> =>bootz     |
>             |    (gdb)Here stop because of breakpoint
>             |    (gdb)q
> 
> Signed-off-by: Peng Fan <van.freenix at gmail.com>

Applied to u-boot/master, thanks!

-- 
Tom
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