clk: renesas: rcar-gen2: Remove superfluous CLK_RENESAS_DIV6 selects

CLK_RENESAS_CPG_MSSR selects CLK_RENESAS_DIV6, and CLK_RCAR_GEN2_CPG
selects CLK_RENESAS_CPG_MSSR, so there is no longer a need for the
individual R-Car Gen2 clock driver options to select CLK_RENESAS_DIV6.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/20200427193446.29738-1-geert+renesas@glider.be

drivers/clk/renesas/Kconfig

@@ -95,12 +95,10 @@ config CLK_R8A7779
 config CLK_R8A7790
 	bool "R-Car H2 clock support" if COMPILE_TEST
 	select CLK_RCAR_GEN2_CPG
-	select CLK_RENESAS_DIV6
 
 config CLK_R8A7791
 	bool "R-Car M2-W/N clock support" if COMPILE_TEST
 	select CLK_RCAR_GEN2_CPG
-	select CLK_RENESAS_DIV6
 
 config CLK_R8A7792
 	bool "R-Car V2H clock support" if COMPILE_TEST
@@ -109,7 +107,6 @@ config CLK_R8A7792
 config CLK_R8A7794
 	bool "R-Car E2 clock support" if COMPILE_TEST
 	select CLK_RCAR_GEN2_CPG
-	select CLK_RENESAS_DIV6
 
 config CLK_R8A7795
 	bool "R-Car H3 clock support" if COMPILE_TEST