Update opensbi to version 1.0 / rev 7 via SR 942352
    
    https://build.opensuse.org/request/show/942352
    by user Andreas_Schwab + dimstar_suse
    - Update to opensbi 1.0
      * SBI HSM suspend as defined by SBI v0.3 specification
      * Position independent execution for firmware
      * Ticket based spinlocks
      * Simplified / reduced platform callbacks
      * ACLINT MTIMER and MSWI support
      * SBI PMU extension as defined by SBI v0.3 specification
      * Simple FDT based GPIO driver framework
      * Improved reset driver framework along with various reset drivers
      * Generic timer delay loop APIs
      * RISC-V Sscofpmf extension support
      * Simple FDT based I2C driver framework along with SiFive I2C driver
      * UART drivers for Gaisler and LiteX platforms (forwarded request 942351 from Andreas_Schwab)