drivers/Kconfig: remove duplicate entry for soc

For some reason there was the same menu entry in menuconfig twice. This
trivial patch leaves the one that is older as is and removes the other
entry.

Signed-off-by: Lars Poeschel <poeschel@lemonage.de>
Signed-off-by: Pramod Gurav <pramod.gurav@smartplayin.com>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>