MAINTAINERS: rectify file entry in ALIBABA PMU DRIVER

Commit cf7b6107 ("drivers/perf: add DDR Sub-System Driveway PMU driver
for Yitian 710 SoC") adds the DDR Sub-System Driveway PMU driver here:

  drivers/perf/alibaba_uncore_drw_pmu.c

The file entry in MAINTAINERS for the ALIBABA PMU DRIVER, introduced with
commit d813a19e

 ("MAINTAINERS: add maintainers for Alibaba' T-Head PMU
driver"), however refers to:

  drivers/perf/alibaba_uncore_dwr_pmu.c

Note the swapping of characters.

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

Repair this file entry in ALIBABA PMU DRIVER.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20220929122937.20132-1-lukas.bulwahn@gmail.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>