Use "Samsung" and "Exynos", not the uppercase versions.

Link: https://lore.kernel.org/r/20210924132658.109814-2-krzysztof.kozlowski@canonical.comReviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>