ALSA: pcm: replace simple_strtoul to kstrtoul

As mentioned in [1], "...simple_strtol(), simple_strtoll(),
simple_strtoul(), and simple_strtoull() functions explicitly
ignore overflows, which may lead to unexpected results in callers."
Hence, the use of those functions is discouraged.

This patch replace the use of the simple_strtoul with the safer
alternatives kstrtoul.

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#simple-strtol-simple-strtoll-simple-strtoul-simple-strtoullSigned-off-by: Hongbo Li <lihongbo22@huawei.com>
Link: https://patch.msgid.link/20240831080639.3985143-1-lihongbo22@huawei.comSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/core/pcm_memory.c

@@ -193,7 +193,10 @@ static void snd_pcm_lib_preallocate_proc_write(struct snd_info_entry *entry,
 	}
 	if (!snd_info_get_line(buffer, line, sizeof(line))) {
 		snd_info_get_str(str, line, sizeof(str));
-		size = simple_strtoul(str, NULL, 10) * 1024;
+		buffer->error = kstrtoul(str, 10, &size);
+		if (buffer->error != 0)
+			return;
+		size *= 1024;
 		if ((size != 0 && size < 8192) || size > substream->dma_max) {
 			buffer->error = -EINVAL;
 			return;