phy: Fix the cacography in phy-exynos5250-usb2.c

The word 'swtich' is wrong, so fix it.

Signed-off-by: Liu Jing <liujing@cmss.chinamobile.com>
Link: https://lore.kernel.org/r/20240701112517.6597-1-liujing@cmss.chinamobile.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>