clk: renesas: r8a7791/r8a7793: Fix LB clock divider

The CLK_TYPE_GEN2_LB clock type is meant for SoCs like R-Car H2, where
the LB clock divider depends on the value of the MD18 pin.

On R-Car M2-W and M2-N, the LB clock divider is fixed to 24.  Hence
model the clock as a fixed factor clock instead.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>

drivers/clk/renesas/r8a7791-cpg-mssr.c

@@ -57,7 +57,6 @@ static struct cpg_core_clk r8a7791_core_clks[] __initdata = {
 
 	/* Core Clock Outputs */
 	DEF_BASE("z",    R8A7791_CLK_Z,    CLK_TYPE_GEN2_Z,    CLK_PLL0),
-	DEF_BASE("lb",   R8A7791_CLK_LB,   CLK_TYPE_GEN2_LB,   CLK_PLL1),
 	DEF_BASE("adsp", R8A7791_CLK_ADSP, CLK_TYPE_GEN2_ADSP, CLK_PLL1),
 	DEF_BASE("sdh",  R8A7791_CLK_SDH,  CLK_TYPE_GEN2_SDH,  CLK_PLL1),
 	DEF_BASE("sd0",  R8A7791_CLK_SD0,  CLK_TYPE_GEN2_SD0,  CLK_PLL1),
@@ -70,6 +69,7 @@ static struct cpg_core_clk r8a7791_core_clks[] __initdata = {
 	DEF_FIXED("hp",     R8A7791_CLK_HP,    CLK_PLL1,         12, 1),
 	DEF_FIXED("i",      R8A7791_CLK_I,     CLK_PLL1,          2, 1),
 	DEF_FIXED("b",      R8A7791_CLK_B,     CLK_PLL1,         12, 1),
+	DEF_FIXED("lb",     R8A7791_CLK_LB,    CLK_PLL1,         24, 1),
 	DEF_FIXED("p",      R8A7791_CLK_P,     CLK_PLL1,         24, 1),
 	DEF_FIXED("cl",     R8A7791_CLK_CL,    CLK_PLL1,         48, 1),
 	DEF_FIXED("m2",     R8A7791_CLK_M2,    CLK_PLL1,          8, 1),