mediatek: mt8192: Fix non-MISRA compliant code

CID 364146: Control flow issues (DEADCODE)

Since the value of PSTATE_PWR_LVL_MASK and the value the of PLAT_MAX_PWR_LVL
are equal on mt8192, the following equation never hold.

if (aff_lvl > PLAT_MAX_PWR_LVL) {
	return PSCI_E_INVALID_PARAMS;
}

Remove the deadcode to comply with MISRA standard.

Signed-off-by: Yidi Lin <yidi.lin@mediatek.com>
Change-Id: I71d0aa826eded8c3b5af961e733167ae40699398
1 file changed