phy: remove unneeded 'fast_io' parameter in regmap_config

When using MMIO with regmap, fast_io is implied. No need to set it
again.

Signed-off-by: Wolfram Sang <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c

···
 	.val_bits = 32,
 	.writeable_reg = rk_hdptx_phy_is_rw_reg,
 	.readable_reg = rk_hdptx_phy_is_rw_reg,
-	.fast_io = true,
 	.max_register = 0x18b4,
 };
 

drivers/phy/rockchip/phy-rockchip-usbdp.c

···
 	.reg_bits = 32,
 	.reg_stride = 4,
 	.val_bits = 32,
-	.fast_io = true,
 	.max_register = 0x20dc,
 };
 

drivers/phy/ti/phy-am654-serdes.c

···
 	.reg_bits = 32,
 	.val_bits = 32,
 	.reg_stride = 4,
-	.fast_io = true,
 	.max_register = 0x1ffc,
 };
 

drivers/phy/ti/phy-j721e-wiz.c

···
 	.reg_bits = 32,
 	.val_bits = 32,
 	.reg_stride = 4,
-	.fast_io = true,
 };
 
 static struct wiz_data j721e_16g_data = {