ti-pruss: Update ICSSG SR2.0 PRU Ethernet and Switch firmwares

Update ICSSG SR2.0 PRU Ethernet and Switch firmwares to version REL.PRU-ICSS-ETHERNET-SWITCH_02.02.15.04

This firmware fixes below issues:
- ICSSG: TAPRIO - Firmware fix to handle base-time which is not a multiple of cycle-time.
- Sequencing of PA_STAT counters is updated
- Adds fixes for Transmit FIFO trigger timing

d34f18e2c92b596140a23af799529042  ti-pruss/am65x-sr2-pru0-prueth-fw.elf
34fea5070a803391c7ab9492caabb813  ti-pruss/am65x-sr2-pru0-prusw-fw.elf
a7e6d898b5249eca7038aa3a1bc6f51d  ti-pruss/am65x-sr2-pru1-prueth-fw.elf
431bfa6e014fbe36e3b191665d3c48a0  ti-pruss/am65x-sr2-pru1-prusw-fw.elf
07e56372e4d3e632dccfbbd6ae0e52d9  ti-pruss/am65x-sr2-rtu0-prueth-fw.elf
9bfe06f1a3db1ebedd02eccf1d0b2070  ti-pruss/am65x-sr2-rtu0-prusw-fw.elf
9cc23dd54b864ca193f1ae5c4f59b948  ti-pruss/am65x-sr2-rtu1-prueth-fw.elf
00f4c3a76d444a70bd1ccaf70a6e51a7  ti-pruss/am65x-sr2-rtu1-prusw-fw.elf
bc148fcb6ad63a92bfe9bd365d0696de  ti-pruss/am65x-sr2-txpru0-prueth-fw.elf
3d02c58174c415cee87e628576cfe73e  ti-pruss/am65x-sr2-txpru0-prusw-fw.elf
4f77034aae2494d092c60a387234de98  ti-pruss/am65x-sr2-txpru1-prueth-fw.elf
8714148e841143d170de25bd44ad7c8f  ti-pruss/am65x-sr2-txpru1-prusw-fw.elf

Based on tag: REL.PRU-ICSS-ETHERNET-SWITCH_02.02.15.04

Signed-off-by: Himanshu Mittal <h-mittal1@ti.com>