ARM: remove redudant information from Kconfig files

 - "string" type for SYS_* is defined in arch/Kconfig
 - SYS_CPU "armv7" has been replaced with "select CPU_V7"
 - SYS_SOC "tegra124" is already defined in tegra124/Kconfig

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
omap: beagle_x15: add MAINTAINERS

Commit 1e4ad74b875f (beagle_x15: add board support for Beagle x15)
missed to add board/ti/beagle_x15/MAINTAINERS.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Felipe Balbi <balbi@ti.com>
stv0991: record defconfig ownership in MAINTAINERS

This commit fixes warnings reported by tools/genboardscfg.py.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Vikas Manocha <vikas.manocha@st.com>
mpc8xx: remove unused linker script

Now TQM8xx is the only remaining board series of mpc8xx.
It uses its own linker script, board/tqc/tqm8xx/u-boot.lds.

arch/powerpc/cpu/mpc8xx/u-boot.lds is not used by any boards.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
linker script

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>