IB/nes: Remove unnecessary parentheses

Clang warns when more than one set of parentheses are used in single
conditional statements.

drivers/infiniband/hw/nes/nes_hw.c:1446:27: warning: equality comparison
with extraneous parentheses [-Wparentheses-equality]
        } while ((temp_phy_data2 == temp_phy_data));
                  ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
drivers/infiniband/hw/nes/nes_hw.c:1446:27: note: remove extraneous
parentheses around the comparison to silence this warning
        } while ((temp_phy_data2 == temp_phy_data));
                 ~               ^               ~
drivers/infiniband/hw/nes/nes_hw.c:1446:27: note: use '=' to turn this
equality comparison into an assignment
        } while ((temp_phy_data2 == temp_phy_data));
                                 ^~
                                 =

Remove the unnecessary parentheses to silence this warning.
Reported-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/nes/nes_hw.c

@@ -1443,7 +1443,7 @@ static int nes_init_2025_phy(struct nes_device *nesdev, u8 phy_type, u8 phy_inde
 		mdelay(1);
 		nes_read_10G_phy_reg(nesdev, phy_index, 0x3, 0xd7ee);
 		temp_phy_data2 = (u16)nes_read_indexed(nesdev, NES_IDX_MAC_MDIO_CONTROL);
-	} while ((temp_phy_data2 == temp_phy_data));
+	} while (temp_phy_data2 == temp_phy_data);
 
 	/* wait for tracking */
 	counter = 0;