Revert "ACPI: CPPC: Adjust debug messages in amd_set_max_freq_ratio() to warn"

Some older systems don't support CPPC in the firmware and this just makes
noise for them when booting.  Drop back to debug.

This reverts commit 21fb59ab4b9767085f4fe1edbdbe3177fbb9ec97.

Fixes: 21fb59ab4b976 ("ACPI: CPPC: Adjust debug messages in amd_set_max_freq_ratio() to warn")
Suggested-by: Kim Phillips <kim.phillips@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Tested-by: Kim Phillips <kim.phillips@amd.com>
Cc: All applicable <stable@vger.kernel.org>
Link: https://patch.msgid.link/20260504230141.484743-2-mario.limonciello@amd.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>