MAINTAINERS: Add entry for Broadcom Broadband SoC HS SPI drivers

The driver and device tree doc were originally authored by Jonas Gorski
and it has been updated from Broadcom recently including the dts yaml
file and a new driver for the updated controller. Add Jonas Gorski and
Broadcom engineers William Zhang and Kursad Oney as the maintainers.
Signed-off-by: William Zhang <william.zhang@broadcom.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20230209200246.141520-16-william.zhang@broadcom.comSigned-off-by: Mark Brown <broonie@kernel.org>

MAINTAINERS

@@ -4299,6 +4299,18 @@ L:	linux-kernel@vger.kernel.org
 S:	Maintained
 F:	drivers/phy/broadcom/phy-brcm-usb*
 
+BROADCOM Broadband SoC High Speed SPI Controller DRIVER
+M:	William Zhang <william.zhang@broadcom.com>
+M:	Kursad Oney <kursad.oney@broadcom.com>
+M:	Jonas Gorski <jonas.gorski@gmail.com>
+R:	Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>
+L:	linux-spi@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/spi/brcm,bcm63xx-hsspi-peripheral-props.yaml
+F:	Documentation/devicetree/bindings/spi/brcm,bcm63xx-hsspi.yaml
+F:	drivers/spi/spi-bcm63xx-hsspi.c
+F:	drivers/spi/spi-bcmbca-hsspi.c
+
 BROADCOM ETHERNET PHY DRIVERS
 M:	Florian Fainelli <f.fainelli@gmail.com>
 R:	Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>