soc: qcom: socinfo: Sort out 8974PRO names

MSM8974PRO is commonly used for referring to Snapdragon 801, compared to
MSM8974 which is Snapdragon 800.

The Snapdragon 801 has three variants with different clock speeds, with
the -AA, -AB and -AC suffix.

Adjust the names in socinfo to reflect this.

Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220415195449.617040-1-luca@z3ntu.xyz