MAINTAINERS: add myself as smbx charger driver maintainer

Missed when this originally went upstream, add myself to the MAINTAINERS
file for this driver.

Signed-off-by: Casey Connolly <casey.connolly@linaro.org>
Link: https://lore.kernel.org/r/20250619-smb2-smb5-support-v1-10-ac5dec51b6e1@linaro.org
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

Author: kcxt

MAINTAINERS

@@ -20523,6 +20523,13 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/mtd/qcom,nandc.yaml
 F:	drivers/mtd/nand/raw/qcom_nandc.c
 
+QUALCOMM SMB CHARGER DRIVER
+M:	Casey Connolly <casey.connolly@linaro.org>
+L:	linux-arm-msm@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/power/supply/qcom,pmi8998-charger.yaml
+F:	drivers/power/supply/qcom_smbx_charger.c
+
 QUALCOMM QSEECOM DRIVER
 M:	Maximilian Luz <luzmaximilian@gmail.com>
 L:	linux-arm-msm@vger.kernel.org