clk: renesas: Remove use of ARCH_R8A7796

CONFIG_ARCH_R8A7796 was renamed to CONFIG_ARCH_R8A77960 in commit
39e57e14 ("soc: renesas: Add ARCH_R8A77960 for existing R-Car
M3-W"), so its users can be removed.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20191211100220.6854-1-geert+renesas@glider.be

drivers/clk/renesas/Kconfig

@@ -21,7 +21,7 @@ config CLK_RENESAS
 	select CLK_R8A7792 if ARCH_R8A7792
 	select CLK_R8A7794 if ARCH_R8A7794
 	select CLK_R8A7795 if ARCH_R8A7795
-	select CLK_R8A77960 if ARCH_R8A77960 || ARCH_R8A7796
+	select CLK_R8A77960 if ARCH_R8A77960
 	select CLK_R8A77961 if ARCH_R8A77961
 	select CLK_R8A77965 if ARCH_R8A77965
 	select CLK_R8A77970 if ARCH_R8A77970