list: leverage list_is_head() for list_entry_is_head()

This is what list_is_head() exactly do.

Link: https://lkml.kernel.org/r/20240208021423.15704-1-richard.weiyang@gmail.com


Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>