The MMC2 clock slices are currently not defined in V3s CCU driver, which
makes MMC2 not working.
Fix this issue.
Fixes: d0f11d14b0bc ("clk: sunxi-ng: add support for V3s CCU")
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
                [CLK_MMC1]              = &mmc1_clk.common.hw,
                [CLK_MMC1_SAMPLE]       = &mmc1_sample_clk.common.hw,
                [CLK_MMC1_OUTPUT]       = &mmc1_output_clk.common.hw,
+               [CLK_MMC2]              = &mmc2_clk.common.hw,
+               [CLK_MMC2_SAMPLE]       = &mmc2_sample_clk.common.hw,
+               [CLK_MMC2_OUTPUT]       = &mmc2_output_clk.common.hw,
                [CLK_CE]                = &ce_clk.common.hw,
                [CLK_SPI0]              = &spi0_clk.common.hw,
                [CLK_USB_PHY0]          = &usb_phy0_clk.common.hw,