cpupower: Add support for parsing 'enabled' or 'disabled' strings from table

When cpufreq_get_sysfs_value_from_table() is passed a table with
kernel strings that report 'enabled' or 'disabled' it always returns 0
because these can't cleanly convert to integers.

Explicitly look for enabled or disabled strings from the kernel to handle
this.

Link: https://lore.kernel.org/r/20241218191144.3440854-3-superm1@kernel.org


Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>