MAINTAINERS: repair Microchip corei2c driver entry

The driver was renamed before application but the relevant change did
not propagate to the MAINTAINERS patch that was applied. Repair it.

CC: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20221109212219.1598355-5-conor@kernel.orgSigned-off-by: Arnd Bergmann <arnd@arndb.de>

MAINTAINERS

@@ -17743,7 +17743,7 @@ F:	Documentation/devicetree/bindings/usb/microchip,mpfs-musb.yaml
 F:	arch/riscv/boot/dts/microchip/
 F:	drivers/char/hw_random/mpfs-rng.c
 F:	drivers/clk/microchip/clk-mpfs.c
-F:	drivers/i2c/busses/i2c-microchip-core.c
+F:	drivers/i2c/busses/i2c-microchip-corei2c.c
 F:	drivers/mailbox/mailbox-mpfs.c
 F:	drivers/pci/controller/pcie-microchip-host.c
 F:	drivers/reset/reset-mpfs.c