kernel: bump 4.19 to 4.19.84

Refreshed all patches.

Altered patches:
- 950-0748-net-bcmgenet-Workaround-for-Pi-4B-network-issue.patch
- 950-0754-Revert-net-bcmgenet-Workaround-for-Pi-4B-network-iss.patch
- 902-debloat_proc.patch

Remove upstreamed:
- 150-MIPS-bmips-mark-exception-vectors-as-char-arrays.patch

New symbols:
X86_INTEL_MPX
X86_INTEL_MEMORY_PROTECTION_KEYS
X86_INTEL_TSX_MODE_OFF
X86_INTEL_TSX_MODE_ON
X86_INTEL_TSX_MODE_AUTO

Compile-tested on: cns3xxx, x86_64
Runtime-tested on: cns3xxx

Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>

target/linux/generic/pending-4.19/220-optimize_inlining.patch

@@ -113,7 +113,7 @@
  {
  	unsigned long rb,rs,prs,r;
  
-@@ -239,7 +239,7 @@ static inline void fixup_tlbie_lpid(unsi
+@@ -300,7 +300,7 @@ static inline void fixup_tlbie_lpid(unsi
  /*
   * We use 128 set in radix mode and 256 set in hpt mode.
   */
@@ -122,7 +122,7 @@
  {
  	int set;
  
-@@ -918,7 +918,7 @@ void radix__tlb_flush(struct mmu_gather
+@@ -982,7 +982,7 @@ void radix__tlb_flush(struct mmu_gather
  	tlb->need_flush_all = 0;
  }