Existing code base only supports one display port, this patch adds
support upto 8 display ports. This support is required to allow platforms
like X13s which have 3 display ports, and some of the Qualcomm SoCs
there are upto 7 Display ports.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org
Link: https://lore.kernel.org/r/20230509112202.21471-4-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org