mmc: sdhci-of-dwcmshc: check bus clock enable result in the probe() method

mmc: sdhci-of-dwcmshc: check bus clock enable result in the probe() method

In the driver's probe() method, clk_disable_unprepare() for the bus clock
is called on the error path even if the prior clk_prepare_enable() call has
failed (and the same thing happens in the remove() method as well) -- that
would cause the prepare/enable counter imbalance.  Also, the same problem
can happen in the driver's suspend() method; note that the resume() method
does check the clk_prepare_enable()'s result -- let's be consistent and do
that in probe() method as well.  BTW, I don't know for sure what does the
bus clock control -- if it affects the register accesses, the driver will
likely cause (e.g. on ARM) a kernel oops if it fails to prepare/enable the
bus clock in the probe() method...

Found by Linux Verification Center (linuxtesting.org) with the Svace static
analysis tool.

Fixes: e438cf49b305 ("mmc: sdhci-of-dwcmshc: add SDHCI OF Synopsys DWC MSHC driver")
Fixes: bccce2ec7790 ("mmc: sdhci-of-dwcmshc: add suspend/resume support")
Signed-off-by: Sergey Shtylyov <s.shtylyov@auroraos.dev>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulfh@kernel.org>