usb: s3c-hsotg: Avoid TxFIFO corruption in DMA mode
usb: s3c-hsotg: Avoid TxFIFO corruption in DMA mode

Writing to TxFIFO relates only to Slave mode and leads to
TxFIFO corruption in DMA mode.

Signed-off-by: Anton Tikhomirov <a7a193d53aa7f828c5bf6d8314a6bc856b252b5f@samsung.com>
Signed-off-by: Felipe Balbi <94dddeeef08b001e003cce128ddc162a4e2c6cd2@ti.com>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas