The recent refactoring of memalloc stuff removed the inclusion of
asm/page.h for simplicity, but it turned out this caused a compile
error due the lack of PAGE_SIZE definition on some architectures.
Do a partial revert for recovering from that.
Fixes: 37af81c599 ("ALSA: core: Abstract memory alloc helpers")
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/202106101858.PfXMMuAa-lkp@intel.com
Link: https://lore.kernel.org/r/20210610110935.10393-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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