README: sh: Drop CONFIG_SYS_I2C_SH_BASE5

This is not used in U-Boot. Drop both the BASE and the SIZE config.
Signed-off-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>
Reviewed-by: NYork Sun <york.sun@nxp.com>

README

@@ -2280,8 +2280,6 @@ CBFS (Coreboot Filesystem) support
 		  - CONFIG_SYS_I2C_SH_SPEED3 for for the speed channel 3
 		  - CONFIG_SYS_I2C_SH_BASE4 for setting the register channel 4
 		  - CONFIG_SYS_I2C_SH_SPEED4 for for the speed channel 4
-		  - CONFIG_SYS_I2C_SH_BASE5 for setting the register channel 5
-		  - CONFIG_SYS_I2C_SH_SPEED5 for for the speed channel 5
 		  - CONFIG_SYS_I2C_SH_NUM_CONTROLLERS for number of i2c buses
 
 		- drivers/i2c/omap24xx_i2c.c