octeon: Introduce 5.15 testing kernel

octeon: Introduce 5.15 testing kernel

octeon/patches-5.10 -> octeon/patches-5.15
Removed 140-octeon_e300_support.patch as E300 support appears to be upstreamed.
Reworked 130-add_itus_support.patch to compensate for the upstreaming of E300

octeon/config-5.15
The following Kernel Symbols were ADDED:
Line 5: +CONFIG_AF_UNIX_OOB=y
Line 6: +CONFIG_AHCI_OCTEON=y
Line 9: +CONFIG_ARCH_KEEP_MEMBLOCK=y
Line 16: +CONFIG_ATA=y
Line 17: +CONFIG_BINARY_PRINTF=y
Line 29: +CONFIG_CPU_R4K_FPU=y
Line 45: +CONFIG_FWNODE_MDIO=y
Line 51: +CONFIG_GENERIC_FIND_FIRST_BIT=y
Line 59: +CONFIG_GLOB=y
Line 61: +CONFIG_GPIO_CDEV=y
Line 77: +CONFIG_LTO_NONE=y
Line 85: +CONFIG_MIPS_FP_SUPPORT=y
Line 93: +CONFIG_NET_SELFTESTS=y
Line 94: +CONFIG_NET_SOCK_MSG=y
Line 105: +CONFIG_PATA_OCTEON_CF=y
Line 106: +CONFIG_PATA_TIMINGS=y
Line 114: +CONFIG_PTP_1588_CLOCK_OPTIONAL=y
Line 121: +CONFIG_SATA_AHCI_PLATFORM=y
Line 122: +CONFIG_SATA_HOST=y
Line 124: +CONFIG_SCSI_COMMON=y
Line 132: +CONFIG_SOCK_RX_QUEUE_MAPPING=y
Line 157: +CONFIG_USB_XHCI_HCD=y
Line 158: +CONFIG_USB_XHCI_PLATFORM=y

The following kernel symbols were REMOVED:
Line 21: -CONFIG_BLK_SCSI_REQUEST=y
Line 37: -CONFIG_ENABLE_MUST_CHECK=y
Line 69: -CONFIG_HOLES_IN_ZONE=y
Line 102: -CONFIG_OF_NET=y
Line 140: -CONFIG_SYS_SUPPORTS_HUGETLBFS=y

Compiled for Itus Shield, Boots successfully, continuing to test
for existing 5.10 memory leak.

Signed-off-by: Donald Hoskins <grommish@gmail.com>
[refresh patches]
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>