MAINTAINERS: repair entry for MICROCHIP MCP16502 PMIC DRIVER

Commit 64db3e8d ("regulator: dt-bindings: microchip,mcp16502: convert
to YAML") converts mcp16502-regulator.txt to microchip,mcp16502.yaml, but
misses to adjust its reference in MAINTAINERS.

Hence, ./scripts/get_maintainer.pl --self-test=patterns complains about a
broken reference.

Repair this file reference in MICROCHIP MCP16502 PMIC DRIVER.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20240207132231.16392-1-lukas.bulwahn@gmail.com


Signed-off-by: Mark Brown <broonie@kernel.org>