riscv: mm: Update the comment of CONFIG_PAGE_OFFSET

stable inclusion
from stable-v6.6.3
commit bf564cf9cac7d9e72c1455fc015f0b81408c3703
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8LBQP

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=bf564cf9cac7d9e72c1455fc015f0b81408c3703



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commit 559fe94a449cba5b50a7cffea60474b385598c00 upstream.

Since the commit 011f09d1 set sv57 as default for CONFIG_64BIT,
the comment of CONFIG_PAGE_OFFSET should be updated too.

Fixes: 011f09d1 ("riscv: mm: Set sv57 on defaultly")
Signed-off-by: Song Shuai <suagrfillet@gmail.com>
Link: https://lore.kernel.org/r/20230809031023.3575407-1-songshuaishuai@tinylab.org


Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>