usb: typec: qcom-pmic: init value of hdr_len/txbuf_len earlier

usb: typec: qcom-pmic: init value of hdr_len/txbuf_len earlier

If the read of USB_PDPHY_RX_ACKNOWLEDGE_REG failed, then hdr_len and
txbuf_len are uninitialized. This commit stops to print uninitialized
value and misleading/false data.

Cc: [email protected]
Fixes: a4422ff22142 (" usb: typec: qcom: Add Qualcomm PMIC Type-C driver")
Signed-off-by: Rex Nie <[email protected]>
Reviewed-by: Heikki Krogerus <[email protected]>
Reviewed-by: Bjorn Andersson <[email protected]>
Acked-by: Bryan O'Donoghue <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>