opensbi: bump to 1.4

opensbi: bump to 1.4

Upgrade the OpenSBI firmware used by RISC-V CPUs to 1.4.

Runtime-tested:
 - d1 (Lichee RV)
 - sifiveu (SiFive Unleashed)

Updates since last release:

1.4:
Synopsys DesignWare APB GPIO driver
Zicntr and Zihpm support
Console print improvements
Smepmp support
Simple FDT based syscon regmap driver
Syscon based reboot and poweroff driver
Non-contiguous hpm counters
Smcntrpmf support
Full sparse hartid support
IPI improvements
RFENCE improvements
Zkr support
Andes custom PMU support

1.3.1:
ACLINT driver fix for disabled CPUs
SBI PMU fix for out-of-bound access
Designware GPIO driver

1.3:
Allow platform to influence cold boot HART selection
Starfive JH7110 platform support
Split RX and RW firmware regions
Advertise non-retentive suspend for allwinner D1 platform
Byteorder/endianness conversion macros
SBI debug console extension (Experimental)
Configure the PMA regions for RZ/Five platform
SBI system suspend extension (Experimental)
SBI PMU platform firmware events (Experimental)
SBI CPPC extension (Experimental)
Optimized remote TLB flushes
Simple heap for boot time memory allocations
Bring back no-map DT property for reserved memory nodes

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>