soc: qcom: Rename llcc-slice to llcc-qcom

[ Upstream commit a0e72a5b ]

The cleaning up was done without changing the driver file name
to ensure a cleaner bisect. Change the file name now to facilitate
making the driver generic in subsequent patch.

Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Stable-dep-of: f1a1bc87 ("soc: qcom: llcc: Handle a second device without data corruption")
Signed-off-by: Sasha Levin <sashal@kernel.org>