mm/vmalloc: remove quoted strings split across lines

A checkpatch.pl script complains on splitting a text across lines.  It is
because if a user wants to find an entire string he or she will not
succeeded.

<snip>
WARNING: quoted string split across lines
+               "vmalloc size %lu allocation failure: "
+               "page order %u allocation failed",

total: 0 errors, 1 warnings, 10 lines checked
<snip>

Link: https://lkml.kernel.org/r/20210521204359.19943-1-urezki@gmail.com


Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Hillf Danton <hdanton@sina.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oleksiy Avramchenko <oleksiy.avramchenko@sonymobile.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>