fix(arm): string split into two lines causing error

Fix the code related error message when user provides RESET_TO_BL31=1 to
the make command but fails to provide "ARM_PRELOADED_DTB_BASE" macro at
the same command line. Remove the line break from the error string
causing the code error.

Additionally, make doesn't parse quote marks in strings, thus remove
quote marks within error strings in this file.

Change-Id: Ic131b6febebfb420ed588fe4fb0853cbdae0afb8
Signed-off-by: Salman Nabi <salman.nabi@arm.com>
1 file changed