disp: msm: dsi: fix parsing of display name from boot name

Change fixes parsing of software TE tag added to the display
name from bootloader.

Change-Id: I4747cc6eff43d681477150d6cad7a737963bf11c
Signed-off-by: Satya Rama Aditya Pinapala <psraditya30@codeaurora.org>