[PATCH] Get rid of the ARM EABI/OABI choice in the menuconfig

[Yann E. MORIN]

Hello All!

Description:
------------

This patch removes the EABI vs. OABI choice in the ARM menuconfig, and
relies on the compiler to set the appropriate macro __ARM_EABI__.

This patch is just a base for discussion and is not yet ready for inclusion.
Notably, the test that it introduces in the Makefile is ugly, and should be
reworked.

Build-tested for armel, EABI/OABI.

Rationale:
----------

Most of the code is already using the __ARM_EABI__ macro, except for one
include file. Once that was fixed, the config knob only serves in a makefile
gragment.

Solution:
---------

The idea is that the user is responsible for either:
 - setting the compiler so that it uses the correct ABI by default,
or
 - setting UCLIBC_EXTRA_CFLAGS to contain appropriate flags to select
   the desired ABI.

Signed-off-by: Yann E. MORIN <yann.morin.1998 at anciens.enib.fr>

Regards,
Yann E. MORIN.

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