ARM: vexpress: use ARM_CPU_SUSPEND if needed
ARM: vexpress: use ARM_CPU_SUSPEND if needed

The vexpress tc2 power management code calls mcpm_loopback, which
is only available if ARM_CPU_SUSPEND is enabled, otherwise we
get a link error:

arch/arm/mach-vexpress/built-in.o: In function `tc2_pm_init':
arch/arm/mach-vexpress/tc2_pm.c:389: undefined reference to `mcpm_loopback'

This explicitly selects ARM_CPU_SUSPEND like other platforms that
need it.

Signed-off-by: Arnd Bergmann <f2c659f01951776204a6c5b902787d9019fbeebd@arndb.de>
Fixes: 3592d7e002438 ("ARM: 8082/1: TC2: test the MCPM loopback during boot")
Acked-by: Nicolas Pitre <d659c10e27d52b00987b65e85d99bce5480adcae@linaro.org>
Acked-by: Liviu Dudau <241e262a49f9916b9dc45cbed05ee6b245e5c836@arm.com>
Cc: Kevin Hilman <f9849b02abe18c1ece6bd40346458ed53f49d31b@linaro.org>
Cc: Sudeep Holla <2f8b50d4d9838571c9f6955972f29e9e41079295@arm.com>
Cc: Lorenzo Pieralisi <b07d7e22a002c36e256b78f51f1f0db608e62a13@arm.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs