soc: qcom: ocmem: Fix NUM_PORTS & NUM_MACROS macros

Since we're using these two macros to read a value from a register, we
need to use the FIELD_GET instead of the FIELD_PREP macro, otherwise
we're getting wrong values.

So instead of:

  [    3.111779] ocmem fdd00000.sram: 2 ports, 1 regions, 512 macros, not interleaved

we now get the correct value of:

  [    3.129672] ocmem fdd00000.sram: 2 ports, 1 regions, 2 macros, not interleaved

Fixes: 88c1e940 ("soc: qcom: add OCMEM driver")
Reviewed-by: Caleb Connolly <caleb.connolly@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Link: https://lore.kernel.org/r/20230506-msm8226-ocmem-v3-1-79da95a2581f@z3ntu.xyz


Signed-off-by: Bjorn Andersson <andersson@kernel.org>