The newly added zx platform causes a build error when
CONFIG_THUMB2_KERNEL is enabled:

arch/arm/mach-zx/headsmp.S:16: Error: invalid immediate for address calculation (value = 0x00000004)

I'm assuming that the ROM code that is calling these entry
points runs in ARM mode, so there would be another problem
in the same file, and we can solve both problems at once
by adding a '.arm' statement that will make zx_resume_jump
and zx_secondary_startup both be built as ARM code.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NJun Nie <jun.nie@linaro.org>
Tested-by: NJun Nie <jun.nie@linaro.org>

Bring up the secondary core. Enable hotplug with supporting
powering off secondary core.
Signed-off-by: NJun Nie <jun.nie@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

Add basic code for ZTE ZX296702 platform.

[arnd: removed unused zx296702_init_machine function, and changed
       l2c aux val to default]
Signed-off-by: NJun Nie <jun.nie@linaro.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>