intel_idle: Remove unnecessary address-of operators

intel_idle: Remove unnecessary address-of operators

Remove redundant address-of operators (&) when assigning the
intel_idle() function pointer to the .enter field in cpuidle_state
structures.in C, the & is not needed for function names.

This change improves code consistency and readability by using the
more conventional form without the & operator.

No functional change intended.

Signed-off-by: Kaushlendra Kumar <kaushlendra.kumar@intel.com>
Reviewed-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Link: https://patch.msgid.link/20250818085124.3897921-1-kaushlendra.kumar@intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>