fix(gic): quote the correct flag on error

Generic GIC driver files should use the USE_GIC_DRIVER flag. When that's
not the case, the correct flag should be quotes to avoid confusion.

Change-Id: I0b0443d52c0b0e81d7b380285a278ffdeae17ca3
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
2 files changed