mmc: usdhi6rol0: catch all errors when getting regulators

Bail out everytime when mmc_regulator_get_supply() returns an errno, not
only when probing gets deferred. This is currently a no-op, because this
function only returns -EPROBE_DEFER or 0 right now. But if it will throw
another error somewhen, it will be for a reason. (This still doesn't change
that getting regulators is optional, so 0 can still mean no regulators
found). So, let us a) be future proof and b) have driver code which is
easier to understand.

Signed-off-by: Wolfram Sang <[e-mail]>
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/mmc/host/usdhi6rol0.c

···
 		return -ENOMEM;
 
 	ret = mmc_regulator_get_supply(mmc);
-	if (ret == -EPROBE_DEFER)
+	if (ret)
 		goto e_free_mmc;
 
 	ret = mmc_of_parse(mmc);