spi: bcm-qspi: Make PM suspend/resume work with SCMI clock management

SCMI only passes clk_prepare_enable() and clk_disable_unprepare(), made
changes to suspend/resume ops to use the appropriate calls so that PM
works for ARM and ARM64 platforms.
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Link: https://lore.kernel.org/r/20200420190853.45614-7-kdasu.kdev@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-bcm-qspi.c

@@ -1411,7 +1411,7 @@ static int __maybe_unused bcm_qspi_suspend(struct device *dev)
 			bcm_qspi_read(qspi, BSPI, BSPI_STRAP_OVERRIDE_CTRL);
 
 	spi_master_suspend(qspi->master);
-	clk_disable(qspi->clk);
+	clk_disable_unprepare(qspi->clk);
 	bcm_qspi_hw_uninit(qspi);
 
 	return 0;
@@ -1429,7 +1429,7 @@ static int __maybe_unused bcm_qspi_resume(struct device *dev)
 		qspi->soc_intc->bcm_qspi_int_set(qspi->soc_intc, MSPI_DONE,
 						 true);
 
-	ret = clk_enable(qspi->clk);
+	ret = clk_prepare_enable(qspi->clk);
 	if (!ret)
 		spi_master_resume(qspi->master);