usb: dwc3: core: move fladj to dwc3 structure

this patch is in preparation for some further
re-factoring in dwc3 initialization. No functional
changes.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 02990ab..e01f637 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -729,6 +729,7 @@
  * @gadget_driver: pointer to the gadget driver
  * @regs: base address for our registers
  * @regs_size: address space size
+ * @fladj: frame length adjustment
  * @nr_scratch: number of scratch buffers
  * @u1u2: only used on revisions <1.83a for workaround
  * @maximum_speed: maximum speed requested (mainly for testing purposes)
@@ -838,6 +839,7 @@
 	/* used for suspend/resume */
 	u32			gctl;
 
+	u32			fladj;
 	u32			nr_scratch;
 	u32			u1u2;
 	u32			maximum_speed;