rtc: efi: fixed typo in efi_procfs()

After the first check of the value of the "eft" variable
it does not change, it is obvious that a copy-paste
error was made here and the value of variable "alm"
should be checked here.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: 501385f ("rtc: efi: add efi_procfs in efi_rtc_ops")
Signed-off-by: Maxim Korotkov <korotkov.maxim.s@gmail.com>
Link: https://lore.kernel.org/r/20231006090444.306729-1-korotkov.maxim.s@gmail.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-efi.c

@@ -227,7 +227,7 @@ static int efi_procfs(struct device *dev, struct seq_file *seq)
 			   enabled == 1 ? "yes" : "no",
 			   pending == 1 ? "yes" : "no");
 
-		if (eft.timezone == EFI_UNSPECIFIED_TIMEZONE)
+		if (alm.timezone == EFI_UNSPECIFIED_TIMEZONE)
 			seq_puts(seq, "Timezone\t: unspecified\n");
 		else
 			/* XXX fixme: convert to string? */