cpufreq: intel_pstate: Fold intel_pstate_max_within_limits() into caller

[ Upstream commit 032c5565 ]

Fold intel_pstate_max_within_limits() into its only caller.

No functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Stable-dep-of: ac4e04d9 ("cpufreq: intel_pstate: Unchecked MSR aceess in legacy mode")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>