xtensa: remove uses of PG_arch_1 on individual pages

xtensa: remove uses of PG_arch_1 on individual pages

Since switching to the new page table range API, we disregard the
PG_arch_1 (aka dcache dirty) flag on tail pages, and only pay attention to
it on the folio.  Fix these two missed spots where we were setting it on
arbitrary pages.

Link: https://lkml.kernel.org/r/20240326171045.410737-3-willy@infradead.org
Reported-by: Svetly Todorov <svetly.todorov@memverge.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Svetly Todorov <svetly.todorov@memverge.com>	[xtensa]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>