spi: pxa2xx: Fix unconditional call of lpss_ssp_setup in pxa2xx_spi_resume

Commit 7566bcc7

 ("spi: pxa2xx: Move is_lpss_ssp() tests to caller") did
not check LPSS before calling lpss_ssp_setup() in pxa2xx_spi_resume().

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>