phy: tegra: xusb: Remove unused powered_on variable

Commit bbf7116 ("phy: tegra: xusb: Add Tegra186 support") added the
variable 'powered_on' to the structure 'tegra_xusb_usb2_lane' but it has
never been used. Therefore, remove this unused variable.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
Link: https://patch.msgid.link/20260202153314.1634145-1-jonathanh@nvidia.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Author: jonhunter

drivers/phy/tegra/xusb.h

@@ -69,7 +69,6 @@ struct tegra_xusb_usb2_lane {
 	struct tegra_xusb_lane base;
 
 	u32 hs_curr_level_offset;
-	bool powered_on;
 };
 
 static inline struct tegra_xusb_usb2_lane *