mfd: Treat arizona register read errors as non-fatal during resume

We're testing for a specific value and while SPI does not detect I/O
errors I2C can.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

drivers/mfd/arizona-core.c

@@ -197,7 +197,7 @@ static int arizona_wait_for_boot(struct arizona *arizona)
 		if (ret != 0) {
 			dev_err(arizona->dev, "Failed to read boot state: %d\n",
 				ret);
-			return ret;
+			continue;
 		}
 
 		if (reg & ARIZONA_BOOT_DONE_STS)