clk: rockchip: rk3128: Fix SCLK_SDMMC's clock name

SCLK_SDMMC is the parent for SCLK_SDMMC_DRV and SCLK_SDMMC_SAMPLE, but
used with the (more) correct name sclk_sdmmc. SD card tuning does currently
fail as the parent can't be found under that name.
There is no need to suffix the name with '0' since RK312x SoCs do have a
single sdmmc controller - so rename it to the name which is already used
by it's children.

Fixes: f6022e88faca ("clk: rockchip: add clock controller for rk3128")
Signed-off-by: Alex Bee <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Heiko Stuebner <[e-mail]>

drivers/clk/rockchip/clk-rk3128.c

···
 	GATE(SCLK_MIPI_24M, "clk_mipi_24m", "xin24m", CLK_IGNORE_UNUSED,
 			RK2928_CLKGATE_CON(2), 15, GFLAGS),
 
-	COMPOSITE(SCLK_SDMMC, "sclk_sdmmc0", mux_mmc_src_p, 0,
+	COMPOSITE(SCLK_SDMMC, "sclk_sdmmc", mux_mmc_src_p, 0,
 			RK2928_CLKSEL_CON(11), 6, 2, MFLAGS, 0, 6, DFLAGS,
 			RK2928_CLKGATE_CON(2), 11, GFLAGS),