MAINTAINERS: Add maintainer entry for Goldfish RTC

Add myself as Goldfish RTC maintainer until someone else is
willing to maintain it.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

MAINTAINERS

@@ -562,6 +562,14 @@ F: include/hw/arm/digic.h
 F: hw/*/digic*
 F: include/hw/*/digic*
 
+Goldfish RTC
+M: Anup Patel <anup.patel@wdc.com>
+M: Alistair Francis <Alistair.Francis@wdc.com>
+L: qemu-riscv@nongnu.org
+S: Maintained
+F: hw/rtc/goldfish_rtc.c
+F: include/hw/rtc/goldfish_rtc.h
+
 Gumstix
 M: Peter Maydell <peter.maydell@linaro.org>
 R: Philippe Mathieu-Daudé <f4bug@amsat.org>