PM: EM: Documentation: Fix bug in example code snippet

PM: EM: Documentation: Fix bug in example code snippet

A semicolon was mistakenly placed at the end of 'if' statements.

If example is copied as-is, it would lead to the subsequent return
being executed unconditionally, which is incorrect, and the rest of the
function would never be reached.

Signed-off-by: Patrick Little <plittle@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
[ rjw: Subject adjustment ]
Link: https://patch.msgid.link/20260128-documentation-fix-grammar-v1-2-39238dc471f9@gmail.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>