mfd: da9052: Add new DA9053 BC chip variant

Add support for a new BC variant of the DA9053 PMIC.

There is one difference between it and the AA, BA and BB.

This patch also corrects a typing mistake in one of the BA
name strings that was incorrectly typed as "ab".

Signed-off-by: Anthony Olech <anthony.olech.opensource@diasemi.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/da9052-spi.c b/drivers/mfd/da9052-spi.c
index 0680bcb..17666b4 100644
--- a/drivers/mfd/da9052-spi.c
+++ b/drivers/mfd/da9052-spi.c
@@ -71,6 +71,7 @@
 	{"da9053-aa", DA9053_AA},
 	{"da9053-ba", DA9053_BA},
 	{"da9053-bb", DA9053_BB},
+	{"da9053-bc", DA9053_BC},
 	{}
 };