usb: enforce byte alignment on USB records

As seen previously, some toolchain are willing to insert padding
at section changes to apply greater alignments by default. This is
especially true with 64-bit builds. USB structures are marked with the
packed attribute and therefore the linker section they land into
must also be byte aligned.

Signed-off-by: Nicolas Pitre <npitre@baylibre.com>

include/usb/bos.h

@@ -9,9 +9,9 @@
 
 #if defined(CONFIG_USB_DEVICE_BOS)
 #define USB_DEVICE_BOS_DESC_DEFINE_HDR \
-	static __in_section(usb, bos_desc_area, 0) __used
+	static __in_section(usb, bos_desc_area, 0) __aligned(1) __used
 #define USB_DEVICE_BOS_DESC_DEFINE_CAP \
-	static __in_section(usb, bos_desc_area, 1) __used
+	static __in_section(usb, bos_desc_area, 1) __aligned(1) __used
 
 /* BOS descriptor type */
 #define DESCRIPTOR_TYPE_BOS		0x0F

include/usb/usb_device.h

@@ -49,17 +49,17 @@ extern "C" {
  * in predetermined order in the RAM.
  */
 #define USBD_DEVICE_DESCR_DEFINE(p) \
-	static __in_section(usb, descriptor_##p, 0) __used
+	static __in_section(usb, descriptor_##p, 0) __used __aligned(1)
 #define USBD_CLASS_DESCR_DEFINE(p, instance) \
-	static __in_section(usb, descriptor_##p.1, instance) __used
+	static __in_section(usb, descriptor_##p.1, instance) __used __aligned(1)
 #define USBD_MISC_DESCR_DEFINE(p) \
-	static __in_section(usb, descriptor_##p, 2) __used
+	static __in_section(usb, descriptor_##p, 2) __used __aligned(1)
 #define USBD_USER_DESCR_DEFINE(p) \
-	static __in_section(usb, descriptor_##p, 3) __used
+	static __in_section(usb, descriptor_##p, 3) __used __aligned(1)
 #define USBD_STRING_DESCR_DEFINE(p) \
-	static __in_section(usb, descriptor_##p, 4) __used
+	static __in_section(usb, descriptor_##p, 4) __used __aligned(1)
 #define USBD_TERM_DESCR_DEFINE(p) \
-	static __in_section(usb, descriptor_##p, 5) __used
+	static __in_section(usb, descriptor_##p, 5) __used __aligned(1)
 
 /*
  * This macro should be used to place the struct usb_cfg_data