mfd: AB8500 register access via PRCMU I2C

This patch adds the choice of accessing the AB8500 registers
via prcmu I2C. Access either via SPI or I2C is supported.

Signed-off-by: Mattias Wallin <mattias.wallin@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/ab8500-spi.c b/drivers/mfd/ab8500-spi.c
index 01b6d58..b165342 100644
--- a/drivers/mfd/ab8500-spi.c
+++ b/drivers/mfd/ab8500-spi.c
@@ -119,7 +119,7 @@
 
 static struct spi_driver ab8500_spi_driver = {
 	.driver = {
-		.name = "ab8500",
+		.name = "ab8500-spi",
 		.owner = THIS_MODULE,
 	},
 	.probe	= ab8500_spi_probe,