phy: samsung: unify naming and describe driver in KConfig

We use everywhere "Samsung" and "Exynos", not the uppercase versions.
Describe better which driver applies to which SoC, to make configuring
kernel for Samsung SoC easier.
Signed-off-by: NKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20210924132658.109814-1-krzysztof.kozlowski@canonical.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

drivers/phy/samsung/Kconfig

@@ -30,16 +30,16 @@ config PHY_EXYNOS_PCIE
 	  This driver provides PHY interface for Exynos PCIe controller.
 
 config PHY_SAMSUNG_UFS
-	tristate "SAMSUNG SoC series UFS PHY driver"
+	tristate "Exynos SoC series UFS PHY driver"
 	depends on OF && (ARCH_EXYNOS || COMPILE_TEST)
 	select GENERIC_PHY
 	help
-	  Enable this to support the Samsung UFS PHY driver for
-	  Samsung SoCs. This driver provides the interface for UFS
-	  host controller to do PHY related programming.
+	  Enable this to support the Samsung Exynos SoC UFS PHY driver for
+	  Samsung Exynos SoCs. This driver provides the interface for UFS host
+	  controller to do PHY related programming.
 
 config PHY_SAMSUNG_USB2
-	tristate "Samsung USB 2.0 PHY driver"
+	tristate "S5P/Exynos SoC series USB 2.0 PHY driver"
 	depends on HAS_IOMEM
 	depends on USB_EHCI_EXYNOS || USB_OHCI_EXYNOS || USB_DWC2 || COMPILE_TEST
 	select GENERIC_PHY
@@ -47,9 +47,9 @@ config PHY_SAMSUNG_USB2
 	default ARCH_EXYNOS
 	help
 	  Enable this to support the Samsung USB 2.0 PHY driver for Samsung
-	  SoCs. This driver provides the interface for USB 2.0 PHY. Support
-	  for particular PHYs will be enabled based on the SoC type in addition
-	  to this driver.
+	  S5Pv210 and Exynos SoCs. This driver provides the interface for USB
+	  2.0 PHY. Support for particular PHYs will be enabled based on the SoC
+	  type in addition to this driver.
 
 config PHY_EXYNOS4210_USB2
 	bool