UPSTREAM: Bluetooth: btqca: Rename ROME specific variables to generic variables

Variables which are named with rome are commonly used for all the
BT SoC's. Instead of continuing further, renamed them to generic
name.

Signed-off-by: Balakrishna Godavarthi <bgodavar@codeaurora.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
(cherry picked from commit e303d124b70920ef86b26d792d8b959166a28f6e)
Signed-off-by: John Stultz <john.stultz@linaro.org>
Change-Id: I89c118b23694cf8f50b6b936207ecb90fc027423