lvgl: bump revision

This brings in a couple fixes from upstream. Most notably it fixes an issue with kscan events from outside the touchpanel range and addresses spurious kscan events on certain i2c controllers. Both have been observed on Arduino Nano 33 BLE.

Signed-off-by: Bartosz Golaszewski bartosz.golaszewski@huawei.com

meta-zephyr-core/recipes-kernel/zephyr-kernel/zephyr-kernel-src-3.0.0.inc

@@ -45,7 +45,7 @@ SRCREV_xtensa = "0e577021bb66e644afd067cd9f7c71ab11b62b3d"
 SRCREV_libmetal = "f237c9d420a51cc43bc37d744e41191ad613f348"
 SRCREV_littlefs = "33509ed9c3d369cdb9d909cd40c5eea8f64a902c"
 SRCREV_loramac-node = "12019623bbad9eb54fe51066847a7cbd4b4eac57"
-SRCREV_lvgl = "a2e17073e5208c221e24e3c2b3b6c473e878bd1e"
+SRCREV_lvgl = "f6541c6015662715d331a5cf71216707122e4e22"
 SRCREV_lz4 = "8e303c264fc21c2116dc612658003a22e933124d"
 SRCREV_mbedtls = "3e3e58a92de76069730c63e0d524f40fea948a61"
 SRCREV_mcuboot = "89936c338e46f43cb177a8b928cd80b90f3ace8f"