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(cherry picked from commit 85502fd1becd71b365b71f4a8fd308ae4953025e)

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

	 and stm32f7-som-64-ext-bsb_config.

Return the configurable command for programming, as MT25Q doesn't
support the default SPINOR_OP_PP_4B command.

Change addressing to 4-byte mode for flashes greater than 16MiB

Based on information from ST:
  "Workarounds linked to Silicon Limitation:
    Extra data written in the FIFO at the end of a read transfer";

Add a new driver named "switch" for run-time selection of wanted devices in DT based on gpios:

    configuration_switch: configuration_switch {
        compatible = "emcraft,configuration-switch";
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_switch>;
    };

...
    pinctrl_switch: switch {
        st,pins {
            /* e5 = 4*16 + 5 = 69 */
            status_pullup = <&gpioe 5 IN
                PULL_UP PUSH_PULL LOW_SPEED>;
        };
    };

...

&usb_fs {
    ...
    configuration-switch-gpios = <&gpioe 5 GPIO_ACTIVE_LOW>;
};

if "tftp" fails.

Orise Tech OTM8009A LCD: MB1166 board from the STM32F769I-DISCO kit.

Default value of RCC_PLLSAICFGR.PLLSAIR=8 doesn't allow to set up
high speed LCD

This is to be able to program it in Linux wout necessity to reconfigure
MPU.
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

- Initialize QSPI during startup;
- Add support of "&&" in U-Boot command chains;
- Set up the "update_uboot", "update_kernel", "env_default" and
  "qspiboot" commands.

- Import the spi_nor.h header file from Linux kernel;
- Add also the qspi U-Boot command for erasing and writing the
  QSPI Flash;
- The QSPI Flash is accessible for reading via 0x90000000;
- The only supported at the moment QSPI Flash Micron MT25QL512ABB1EW9
  is currently hardcoded.

- Replace local macros for flash base size with generic ones (from
  include/configs/*.h);
- Add four banks 256KiB each in according with RM0410 "3.3.1 Flash
  memory organization".

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>

Signed-off-by: Yuri Tikhonov <yur@emcraft.com>