crash_dump: fix boolreturn.cocci warning

JIRA: https://issues.redhat.com/browse/RHEL-32199

Upstream Status: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

commit 5605f41
Author: Changcheng Deng <deng.changcheng@zte.com.cn>
Date:   Mon Nov 8 18:35:07 2021 -0800

    crash_dump: fix boolreturn.cocci warning

    ./include/linux/crash_dump.h: 119: 50-51: WARNING: return of 0/1 in
    function 'is_kdump_kernel' with return type bool

    Return statements in functions returning bool should use true/false
    instead of 1/0.

    Link: https://lkml.kernel.org/r/20211020083905.1037952-1-deng.changcheng@zte.com.cn
    Signed-off-by: Changcheng Deng <deng.changcheng@zte.com.cn>
    Reported-by: Zeal Robot <zealci@zte.com.cn>
    Reviewed-by: Simon Horman <horms@kernel.org>
    Acked-by: Baoquan He <bhe@redhat.com>
    Cc: Dave Young <dyoung@redhat.com>
    Cc: Mike Rapoport <rppt@linux.ibm.com>
    Cc: Vivek Goyal <vgoyal@redhat.com>
    Cc: Ye Guojin <ye.guojin@zte.com.cn>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: Baoquan He <bhe@redhat.com>

Author: Baoquan He

include/linux/crash_dump.h

@@ -117,7 +117,7 @@ extern void register_vmcore_cb(struct vmcore_cb *cb);
 extern void unregister_vmcore_cb(struct vmcore_cb *cb);
 
 #else /* !CONFIG_CRASH_DUMP */
-static inline bool is_kdump_kernel(void) { return 0; }
+static inline bool is_kdump_kernel(void) { return false; }
 #endif /* CONFIG_CRASH_DUMP */
 
 /* Device Dump information to be filled by drivers */