initramfs: remove unnecessary (void*) conversion

Remove unnecessary void* type casting.

Link: https://lkml.kernel.org/r/20221026080517.3221-1-xupengfei@nfschina.comSigned-off-by: XU pengfei <xupengfei@nfschina.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: David Disseldorp <ddiss@suse.de>
Cc: "Eric W . Biederman" <ebiederm@xmission.com>
Cc: Martin Wilck <mwilck@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: wuchi <wuchi.zero@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

init/initramfs.c

@@ -461,7 +461,7 @@ static long __init write_buffer(char *buf, unsigned long len)
 
 static long __init flush_buffer(void *bufv, unsigned long len)
 {
-	char *buf = (char *) bufv;
+	char *buf = bufv;
 	long written;
 	long origLen = len;
 	if (message)