[marvell-armhf] Update MRVL_PRESTERA_DRIVER (sonic-net#17780)

Changes in MRVL_PRESTERA_DRIVER_1.8:
 * Migrate dtb to kernel 6.1.
 * Fix i2c kernel error log,
	[ 51.331287] i2c i2c-0: mv64xxx: I2C bus locked, block: 1, time_left: 0.

Signed-off-by: Pavan Naregundi <pnaregundi@marvell.com>

platform/marvell-armhf/prestera.mk

@@ -4,7 +4,7 @@ export MRVL_PRESTERA_VER = 1.0
 export MRVL_PRESTERA = mrvlprestera_$(MRVL_PRESTERA_VER)_$(PLATFORM_ARCH)
 export MRVL_PRESTERA_DEB = $(MRVL_PRESTERA).deb
 export MRVL_PRESTERA_SRC_URL = https://github.com/Marvell-switching/mrvl-prestera.git
-export MRVL_PRESTERA_SRC_TAG = MRVL_PRESTERA_DRIVER_1.7
+export MRVL_PRESTERA_SRC_TAG = MRVL_PRESTERA_DRIVER_1.8
 
 $(MRVL_PRESTERA_DEB)_SRC_PATH = $(PLATFORM_PATH)/prestera
 $(MRVL_PRESTERA_DEB)_DEPENDS += $(LINUX_HEADERS) $(LINUX_HEADERS_COMMON)