firmware: iscsi_ibft: fix ISCSI_IBFT Kconfig entry

Fix ISCSI_IBFT Kconfig entry, replace tab with a space character.

Fixes: 138fe4e ("Firmware: add iSCSI iBFT Support")
Signed-off-by: Prasad Pandit <pjp@fedoraproject.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

Author: Prasad Pandit

drivers/firmware/Kconfig

@@ -106,7 +106,7 @@ config ISCSI_IBFT
 	select ISCSI_BOOT_SYSFS
 	select ISCSI_IBFT_FIND if X86
 	depends on ACPI && SCSI && SCSI_LOWLEVEL
-	default	n
+	default n
 	help
 	  This option enables support for detection and exposing of iSCSI
 	  Boot Firmware Table (iBFT) via sysfs to userspace. If you wish to