bootcount: Add pmic pfuze100 bootcount driver

Use the MEMA - MEMD registers on the PFUZE100 as bootcount
registers.

Based on work from Heiko Schocher <hs@denx.de>.
Signed-off-by: Philip Oberfichtner <pro@denx.de>
diff --git a/drivers/bootcount/Kconfig b/drivers/bootcount/Kconfig
index 607027c..509d01d 100644
--- a/drivers/bootcount/Kconfig
+++ b/drivers/bootcount/Kconfig
@@ -127,6 +127,13 @@
 	  pointing to the underlying i2c eeprom device) and an optional 'offset'
 	  property are supported.
 
+config DM_BOOTCOUNT_PMIC_PFUZE100
+	bool "Enable Bootcount driver for PMIC PFUZE100"
+	depends on DM_PMIC_PFUZE100
+	help
+	  Enable support for the bootcounter using PMIC PFUZE100 registers.
+	  This works only, if the PMIC is not connected.
+
 config DM_BOOTCOUNT_SPI_FLASH
 	bool "Support SPI flash devices as a backing store for bootcount"
 	depends on DM_SPI_FLASH