drm/i915/guc/slpc: Correct the param count for unset param

drm/i915/guc/slpc: Correct the param count for unset param

BugLink: https://bugs.launchpad.net/bugs/1964361
[ Upstream commit 1b279f6ad467535c3b8a66b4edefaca2cdd5bdc3 ]

SLPC unset param H2G only needs one parameter - the id of the
param.

Fixes: 025cb07bebfa ("drm/i915/guc/slpc: Cache platform frequency limits")
Suggested-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Reviewed-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220216181504.7155-1-vinay.belgaumkar@intel.com
(cherry picked from commit 9648f1c3739505557d94ff749a4f32192ea81fe3)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>