soc: qcom: llcc: Flip the manual slice configuration condition

Commit c14e64b4 ("soc: qcom: llcc: Support chipsets that can write
to llcc") made the code not configure certain registers on SDM845 due
to firmware security policies. That turned out only to concern SDM845,
but the condition was chosen such that all other entries (for SoCs that
didnot need it) were required to set .need_llcc_cfg = true.

Flip the condition, so the default is "doesn't need the workaround".

Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20241104-topic-llcc_flip-v1-1-3003c846d131@oss.qualcomm.com


[bjorn: Dropped a few newly added need_llcc_cfg uses]
Signed-off-by: Bjorn Andersson <andersson@kernel.org>