axs10x: add support of generic EHCI USB 2.0 controller

This commit adds support of USB 2.0 storage media on AXS10x boards.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Simon Glass <sjg@chromium.org>

arch/arc/dts/axs10x.dts

@@ -42,4 +42,10 @@
 		clock-names = "stmmaceth";
 		max-speed = <100>;
 	};
+
+	ehci@0xe0040000 {
+		compatible = "generic-ehci";
+		reg = < 0xe0040000 0x100 >;
+		interrupts = < 8 >;
+	};
 };

configs/axs101_defconfig

@@ -8,6 +8,7 @@ CONFIG_DEFAULT_DEVICE_TREE="axs10x"
 CONFIG_SYS_PROMPT="AXS# "
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set
+CONFIG_CMD_USB=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_PING=y
@@ -19,4 +20,9 @@ CONFIG_CLK=y
 CONFIG_DM_ETH=y
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_SYS_NS16550=y
+CONFIG_USB=y
+CONFIG_DM_USB=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_GENERIC=y
+CONFIG_USB_STORAGE=y
 CONFIG_USE_PRIVATE_LIBGCC=y

configs/axs103_defconfig

@@ -7,6 +7,7 @@ CONFIG_DEFAULT_DEVICE_TREE="axs10x"
 CONFIG_SYS_PROMPT="AXS# "
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set
+CONFIG_CMD_USB=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_PING=y
@@ -18,4 +19,9 @@ CONFIG_CLK=y
 CONFIG_DM_ETH=y
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_SYS_NS16550=y
+CONFIG_USB=y
+CONFIG_DM_USB=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_EHCI_GENERIC=y
+CONFIG_USB_STORAGE=y
 CONFIG_USE_PRIVATE_LIBGCC=y