msm: Kconfig: update entry for 8226

8226 no longer shares the same binary with 8974. Remove unnecessary
config options and add options for the new cpu.

The defconfig automatically syncs up with the Kconfig. This generates
boot, initrd and zImage files named after 8226 using the 8910
defconfig. Change position of 8226 options so that these files use
8910 in their names.

Change-Id: I9b3392bed5a2e1244f67be991302bd5f0329540b
Signed-off-by: Syed Rameez Mustafa <rameezmustafa@codeaurora.org>