MAINTAINERS: Update qcom CPR maintainer entry

I do no longer have access to qcom CPR hardware, nor the documentation for
said hardware.

Based on past and recent activity, I propose Bjorn and Konrad as the new
qcom CPR maintainers.

Signed-off-by: Niklas Cassel <nks@flawful.org>
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Acked-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230123104305.44641-1-niklas.cassel@wdc.com